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Finding the Fourth Proportional to 77,658.52, 107,142.99 and 63,293.65

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Solution

The fourth proportional to 77,658.52, 107,142.99 and 63,293.65 is: 87,324.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,658.52 : 107,142.99 = 63,293.65 : x
  2. Step 2: Convert to fraction form
    77,658.52/107,142.99 = 63,293.65/x
  3. Step 3: Cross multiply
    77,658.52x = 107,142.99 × 63,293.65
  4. Step 4: Simplify right side
    77,658.52x = 6,781,470,909.01
  5. Step 5: Solve for x
    x = 6,781,470,909.01/77,658.52
  6. Step 6: Final answer
    x = 87,324.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.