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Finding the Fourth Proportional to 86,476.32, 129,718 and 39,082.32

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Solution

The fourth proportional to 86,476.32, 129,718 and 39,082.32 is: 58,625.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,476.32 : 129,718 = 39,082.32 : x
  2. Step 2: Convert to fraction form
    86,476.32/129,718 = 39,082.32/x
  3. Step 3: Cross multiply
    86,476.32x = 129,718 × 39,082.32
  4. Step 4: Simplify right side
    86,476.32x = 5,069,680,385.76
  5. Step 5: Solve for x
    x = 5,069,680,385.76/86,476.32
  6. Step 6: Final answer
    x = 58,625.07

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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.