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Finding the Fourth Proportional to 115,148.80, 172,723.20 and 44,978.91

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Solution

The fourth proportional to 115,148.80, 172,723.20 and 44,978.91 is: 67,468.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,148.80 : 172,723.20 = 44,978.91 : x
  2. Step 2: Convert to fraction form
    115,148.80/172,723.20 = 44,978.91/x
  3. Step 3: Cross multiply
    115,148.80x = 172,723.20 × 44,978.91
  4. Step 4: Simplify right side
    115,148.80x = 7,768,900,704.34
  5. Step 5: Solve for x
    x = 7,768,900,704.34/115,148.80
  6. Step 6: Final answer
    x = 67,468.36

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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.