Home / 86,385.28-129,774.08-74,575.36

Finding the Fourth Proportional to 86,385.28, 129,774.08 and 74,575.36

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Solution

The fourth proportional to 86,385.28, 129,774.08 and 74,575.36 is: 112,032.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,385.28 : 129,774.08 = 74,575.36 : x
  2. Step 2: Convert to fraction form
    86,385.28/129,774.08 = 74,575.36/x
  3. Step 3: Cross multiply
    86,385.28x = 129,774.08 × 74,575.36
  4. Step 4: Simplify right side
    86,385.28x = 9,677,948,734.67
  5. Step 5: Solve for x
    x = 9,677,948,734.67/86,385.28
  6. Step 6: Final answer
    x = 112,032.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.