Home / 81,104.28-112,000.91-76,686.54

Finding the Fourth Proportional to 81,104.28, 112,000.91 and 76,686.54

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Solution

The fourth proportional to 81,104.28, 112,000.91 and 76,686.54 is: 105,900.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.28 : 112,000.91 = 76,686.54 : x
  2. Step 2: Convert to fraction form
    81,104.28/112,000.91 = 76,686.54/x
  3. Step 3: Cross multiply
    81,104.28x = 112,000.91 × 76,686.54
  4. Step 4: Simplify right side
    81,104.28x = 8,588,961,881.32
  5. Step 5: Solve for x
    x = 8,588,961,881.32/81,104.28
  6. Step 6: Final answer
    x = 105,900.23

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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.