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Finding the Fourth Proportional to 102,511.80, 153,767.70 and 98,575.20

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Solution

The fourth proportional to 102,511.80, 153,767.70 and 98,575.20 is: 147,862.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,511.80 : 153,767.70 = 98,575.20 : x
  2. Step 2: Convert to fraction form
    102,511.80/153,767.70 = 98,575.20/x
  3. Step 3: Cross multiply
    102,511.80x = 153,767.70 × 98,575.20
  4. Step 4: Simplify right side
    102,511.80x = 15,157,681,781.04
  5. Step 5: Solve for x
    x = 15,157,681,781.04/102,511.80
  6. Step 6: Final answer
    x = 147,862.80

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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.