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Finding the Fourth Proportional to 73,042.65, 109,350.45 and 66,038.79

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Solution

The fourth proportional to 73,042.65, 109,350.45 and 66,038.79 is: 98,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,042.65 : 109,350.45 = 66,038.79 : x
  2. Step 2: Convert to fraction form
    73,042.65/109,350.45 = 66,038.79/x
  3. Step 3: Cross multiply
    73,042.65x = 109,350.45 × 66,038.79
  4. Step 4: Simplify right side
    73,042.65x = 7,221,371,403.96
  5. Step 5: Solve for x
    x = 7,221,371,403.96/73,042.65
  6. Step 6: Final answer
    x = 98,865.13

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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.