Home / 81,660,211.20-122,490,316.80-72,732,002.40

Finding the Fourth Proportional to 81,660,211.20, 122,490,316.80 and 72,732,002.40

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Solution

The fourth proportional to 81,660,211.20, 122,490,316.80 and 72,732,002.40 is: 109,098,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,660,211.20 : 122,490,316.80 = 72,732,002.40 : x
  2. Step 2: Convert to fraction form
    81,660,211.20/122,490,316.80 = 72,732,002.40/x
  3. Step 3: Cross multiply
    81,660,211.20x = 122,490,316.80 × 72,732,002.40
  4. Step 4: Simplify right side
    81,660,211.20x = 8,908,966,015,474,361
  5. Step 5: Solve for x
    x = 8,908,966,015,474,361/81,660,211.20
  6. Step 6: Final answer
    x = 109,098,003.60

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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.