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Finding the Fourth Proportional to 71,658.60, 107,488.16 and 21,739.12

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Solution

The fourth proportional to 71,658.60, 107,488.16 and 21,739.12 is: 32,608.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,658.60 : 107,488.16 = 21,739.12 : x
  2. Step 2: Convert to fraction form
    71,658.60/107,488.16 = 21,739.12/x
  3. Step 3: Cross multiply
    71,658.60x = 107,488.16 × 21,739.12
  4. Step 4: Simplify right side
    71,658.60x = 2,336,698,008.82
  5. Step 5: Solve for x
    x = 2,336,698,008.82/71,658.60
  6. Step 6: Final answer
    x = 32,608.76

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1.5x scale

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.