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Finding the Fourth Proportional to 131,892.82, 197,866.92 and 43,139.40

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Solution

The fourth proportional to 131,892.82, 197,866.92 and 43,139.40 is: 64,718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,892.82 : 197,866.92 = 43,139.40 : x
  2. Step 2: Convert to fraction form
    131,892.82/197,866.92 = 43,139.40/x
  3. Step 3: Cross multiply
    131,892.82x = 197,866.92 × 43,139.40
  4. Step 4: Simplify right side
    131,892.82x = 8,535,860,498.76
  5. Step 5: Solve for x
    x = 8,535,860,498.76/131,892.82
  6. Step 6: Final answer
    x = 64,718.16

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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.