Home / 81,660,103.20-122,490,154.80-72,731,894.40

Finding the Fourth Proportional to 81,660,103.20, 122,490,154.80 and 72,731,894.40

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Solution

The fourth proportional to 81,660,103.20, 122,490,154.80 and 72,731,894.40 is: 109,097,841.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,660,103.20 : 122,490,154.80 = 72,731,894.40 : x
  2. Step 2: Convert to fraction form
    81,660,103.20/122,490,154.80 = 72,731,894.40/x
  3. Step 3: Cross multiply
    81,660,103.20x = 122,490,154.80 × 72,731,894.40
  4. Step 4: Simplify right side
    81,660,103.20x = 8,908,941,003,953,254
  5. Step 5: Solve for x
    x = 8,908,941,003,953,254/81,660,103.20
  6. Step 6: Final answer
    x = 109,097,841.60

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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.