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Finding the Fourth Proportional to 71,862,215.20, 107,793,322.80 and 28,710,080.80

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Solution

The fourth proportional to 71,862,215.20, 107,793,322.80 and 28,710,080.80 is: 43,065,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,862,215.20 : 107,793,322.80 = 28,710,080.80 : x
  2. Step 2: Convert to fraction form
    71,862,215.20/107,793,322.80 = 28,710,080.80/x
  3. Step 3: Cross multiply
    71,862,215.20x = 107,793,322.80 × 28,710,080.80
  4. Step 4: Simplify right side
    71,862,215.20x = 3,094,755,007,288,482
  5. Step 5: Solve for x
    x = 3,094,755,007,288,482/71,862,215.20
  6. Step 6: Final answer
    x = 43,065,121.20

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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.