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Finding the Fourth Proportional to 83,896.80, 125,881.65 and 42,343.80

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Solution

The fourth proportional to 83,896.80, 125,881.65 and 42,343.80 is: 63,534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,896.80 : 125,881.65 = 42,343.80 : x
  2. Step 2: Convert to fraction form
    83,896.80/125,881.65 = 42,343.80/x
  3. Step 3: Cross multiply
    83,896.80x = 125,881.65 × 42,343.80
  4. Step 4: Simplify right side
    83,896.80x = 5,330,307,411.27
  5. Step 5: Solve for x
    x = 5,330,307,411.27/83,896.80
  6. Step 6: Final answer
    x = 63,534.10

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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.