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Finding the Fourth Proportional to 112,708.76, 155,538.08 and 62,407.76

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Solution

The fourth proportional to 112,708.76, 155,538.08 and 62,407.76 is: 86,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,708.76 : 155,538.08 = 62,407.76 : x
  2. Step 2: Convert to fraction form
    112,708.76/155,538.08 = 62,407.76/x
  3. Step 3: Cross multiply
    112,708.76x = 155,538.08 × 62,407.76
  4. Step 4: Simplify right side
    112,708.76x = 9,706,783,167.50
  5. Step 5: Solve for x
    x = 9,706,783,167.50/112,708.76
  6. Step 6: Final answer
    x = 86,122.70

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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.