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Finding the Fourth Proportional to 100,337.78, 138,468.77 and 56,726.85

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Solution

The fourth proportional to 100,337.78, 138,468.77 and 56,726.85 is: 78,284.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,337.78 : 138,468.77 = 56,726.85 : x
  2. Step 2: Convert to fraction form
    100,337.78/138,468.77 = 56,726.85/x
  3. Step 3: Cross multiply
    100,337.78x = 138,468.77 × 56,726.85
  4. Step 4: Simplify right side
    100,337.78x = 7,854,896,861.84
  5. Step 5: Solve for x
    x = 7,854,896,861.84/100,337.78
  6. Step 6: Final answer
    x = 78,284.54

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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.