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Finding the Fourth Proportional to 206,779,990.88, 285,398,731.68 and 123,197,085.20

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Solution

The fourth proportional to 206,779,990.88, 285,398,731.68 and 123,197,085.20 is: 170,037,205.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,779,990.88 : 285,398,731.68 = 123,197,085.20 : x
  2. Step 2: Convert to fraction form
    206,779,990.88/285,398,731.68 = 123,197,085.20/x
  3. Step 3: Cross multiply
    206,779,990.88x = 285,398,731.68 × 123,197,085.20
  4. Step 4: Simplify right side
    206,779,990.88x = 35,160,291,862,752,900
  5. Step 5: Solve for x
    x = 35,160,291,862,752,900/206,779,990.88
  6. Step 6: Final answer
    x = 170,037,205.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.