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Finding the Fourth Proportional to 91,230.80, 136,867.54 and 31,259.92

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Solution

The fourth proportional to 91,230.80, 136,867.54 and 31,259.92 is: 46,897.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,230.80 : 136,867.54 = 31,259.92 : x
  2. Step 2: Convert to fraction form
    91,230.80/136,867.54 = 31,259.92/x
  3. Step 3: Cross multiply
    91,230.80x = 136,867.54 × 31,259.92
  4. Step 4: Simplify right side
    91,230.80x = 4,278,468,771.32
  5. Step 5: Solve for x
    x = 4,278,468,771.32/91,230.80
  6. Step 6: Final answer
    x = 46,897.20

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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.