Home / 81,465,877.20-122,198,815.80-72,537,668.40

Finding the Fourth Proportional to 81,465,877.20, 122,198,815.80 and 72,537,668.40

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Solution

The fourth proportional to 81,465,877.20, 122,198,815.80 and 72,537,668.40 is: 108,806,502.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465,877.20 : 122,198,815.80 = 72,537,668.40 : x
  2. Step 2: Convert to fraction form
    81,465,877.20/122,198,815.80 = 72,537,668.40/x
  3. Step 3: Cross multiply
    81,465,877.20x = 122,198,815.80 × 72,537,668.40
  4. Step 4: Simplify right side
    81,465,877.20x = 8,864,017,179,373,081
  5. Step 5: Solve for x
    x = 8,864,017,179,373,081/81,465,877.20
  6. Step 6: Final answer
    x = 108,806,502.60

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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.