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Finding the Fourth Proportional to 87,969, 121,404.90 and 48,232.68

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Solution

The fourth proportional to 87,969, 121,404.90 and 48,232.68 is: 66,565.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,969 : 121,404.90 = 48,232.68 : x
  2. Step 2: Convert to fraction form
    87,969/121,404.90 = 48,232.68/x
  3. Step 3: Cross multiply
    87,969x = 121,404.90 × 48,232.68
  4. Step 4: Simplify right side
    87,969x = 5,855,683,692.13
  5. Step 5: Solve for x
    x = 5,855,683,692.13/87,969
  6. Step 6: Final answer
    x = 66,565.31

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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.