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Finding the Fourth Proportional to 71,345.88, 106,390.80 and 66,359.52

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Solution

The fourth proportional to 71,345.88, 106,390.80 and 66,359.52 is: 98,955.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,345.88 : 106,390.80 = 66,359.52 : x
  2. Step 2: Convert to fraction form
    71,345.88/106,390.80 = 66,359.52/x
  3. Step 3: Cross multiply
    71,345.88x = 106,390.80 × 66,359.52
  4. Step 4: Simplify right side
    71,345.88x = 7,060,042,420.42
  5. Step 5: Solve for x
    x = 7,060,042,420.42/71,345.88
  6. Step 6: Final answer
    x = 98,955.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.