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Finding the Fourth Proportional to 131,505.60, 197,128.80 and 64,891.20

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Solution

The fourth proportional to 131,505.60, 197,128.80 and 64,891.20 is: 97,272.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,505.60 : 197,128.80 = 64,891.20 : x
  2. Step 2: Convert to fraction form
    131,505.60/197,128.80 = 64,891.20/x
  3. Step 3: Cross multiply
    131,505.60x = 197,128.80 × 64,891.20
  4. Step 4: Simplify right side
    131,505.60x = 12,791,924,386.56
  5. Step 5: Solve for x
    x = 12,791,924,386.56/131,505.60
  6. Step 6: Final answer
    x = 97,272.85

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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.