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Finding the Fourth Proportional to 60,522,400.80, 90,791,895.60 and 20,128,672.80

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Solution

The fourth proportional to 60,522,400.80, 90,791,895.60 and 20,128,672.80 is: 30,195,767.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,522,400.80 : 90,791,895.60 = 20,128,672.80 : x
  2. Step 2: Convert to fraction form
    60,522,400.80/90,791,895.60 = 20,128,672.80/x
  3. Step 3: Cross multiply
    60,522,400.80x = 90,791,895.60 × 20,128,672.80
  4. Step 4: Simplify right side
    60,522,400.80x = 1,827,520,359,424,159.75
  5. Step 5: Solve for x
    x = 1,827,520,359,424,159.75/60,522,400.80
  6. Step 6: Final answer
    x = 30,195,767.77

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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.