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Finding the Fourth Proportional to 65,428, 98,155.40 and 25,446.04

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Solution

The fourth proportional to 65,428, 98,155.40 and 25,446.04 is: 38,174.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,428 : 98,155.40 = 25,446.04 : x
  2. Step 2: Convert to fraction form
    65,428/98,155.40 = 25,446.04/x
  3. Step 3: Cross multiply
    65,428x = 98,155.40 × 25,446.04
  4. Step 4: Simplify right side
    65,428x = 2,497,666,234.62
  5. Step 5: Solve for x
    x = 2,497,666,234.62/65,428
  6. Step 6: Final answer
    x = 38,174.27

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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.