Home / 102,499.11-153,781.47-85,819.59

Finding the Fourth Proportional to 102,499.11, 153,781.47 and 85,819.59

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Solution

The fourth proportional to 102,499.11, 153,781.47 and 85,819.59 is: 128,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,499.11 : 153,781.47 = 85,819.59 : x
  2. Step 2: Convert to fraction form
    102,499.11/153,781.47 = 85,819.59/x
  3. Step 3: Cross multiply
    102,499.11x = 153,781.47 × 85,819.59
  4. Step 4: Simplify right side
    102,499.11x = 13,197,462,705.00
  5. Step 5: Solve for x
    x = 13,197,462,705.00/102,499.11
  6. Step 6: Final answer
    x = 128,756.85

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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.