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Finding the Fourth Proportional to 80,941.80, 121,412.70 and 58,909.80

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Solution

The fourth proportional to 80,941.80, 121,412.70 and 58,909.80 is: 88,364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,941.80 : 121,412.70 = 58,909.80 : x
  2. Step 2: Convert to fraction form
    80,941.80/121,412.70 = 58,909.80/x
  3. Step 3: Cross multiply
    80,941.80x = 121,412.70 × 58,909.80
  4. Step 4: Simplify right side
    80,941.80x = 7,152,397,874.46
  5. Step 5: Solve for x
    x = 7,152,397,874.46/80,941.80
  6. Step 6: Final answer
    x = 88,364.70

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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.