Home / 81,653,020.80-122,479,531.20-81,086,150.40

Finding the Fourth Proportional to 81,653,020.80, 122,479,531.20 and 81,086,150.40

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Solution

The fourth proportional to 81,653,020.80, 122,479,531.20 and 81,086,150.40 is: 121,629,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,653,020.80 : 122,479,531.20 = 81,086,150.40 : x
  2. Step 2: Convert to fraction form
    81,653,020.80/122,479,531.20 = 81,086,150.40/x
  3. Step 3: Cross multiply
    81,653,020.80x = 122,479,531.20 × 81,086,150.40
  4. Step 4: Simplify right side
    81,653,020.80x = 9,931,393,687,804,694
  5. Step 5: Solve for x
    x = 9,931,393,687,804,694/81,653,020.80
  6. Step 6: Final answer
    x = 121,629,225.60

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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.