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Finding the Fourth Proportional to 112,646.76, 155,292.30 and 76,790.76

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Solution

The fourth proportional to 112,646.76, 155,292.30 and 76,790.76 is: 105,862.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,646.76 : 155,292.30 = 76,790.76 : x
  2. Step 2: Convert to fraction form
    112,646.76/155,292.30 = 76,790.76/x
  3. Step 3: Cross multiply
    112,646.76x = 155,292.30 × 76,790.76
  4. Step 4: Simplify right side
    112,646.76x = 11,925,013,739.15
  5. Step 5: Solve for x
    x = 11,925,013,739.15/112,646.76
  6. Step 6: Final answer
    x = 105,862.02

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.