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Finding the Fourth Proportional to 72,349.79, 108,542.45 and 58,435.91

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Solution

The fourth proportional to 72,349.79, 108,542.45 and 58,435.91 is: 87,668.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,349.79 : 108,542.45 = 58,435.91 : x
  2. Step 2: Convert to fraction form
    72,349.79/108,542.45 = 58,435.91/x
  3. Step 3: Cross multiply
    72,349.79x = 108,542.45 × 58,435.91
  4. Step 4: Simplify right side
    72,349.79x = 6,342,776,547.20
  5. Step 5: Solve for x
    x = 6,342,776,547.20/72,349.79
  6. Step 6: Final answer
    x = 87,668.21

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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.