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Finding the Fourth Proportional to 102,593.80, 153,987.90 and 87,819.40

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Solution

The fourth proportional to 102,593.80, 153,987.90 and 87,819.40 is: 131,812.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,593.80 : 153,987.90 = 87,819.40 : x
  2. Step 2: Convert to fraction form
    102,593.80/153,987.90 = 87,819.40/x
  3. Step 3: Cross multiply
    102,593.80x = 153,987.90 × 87,819.40
  4. Step 4: Simplify right side
    102,593.80x = 13,523,124,985.26
  5. Step 5: Solve for x
    x = 13,523,124,985.26/102,593.80
  6. Step 6: Final answer
    x = 131,812.30

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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.