Home / 81,262,561.80-121,893,842.70-38,215,840.80

Finding the Fourth Proportional to 81,262,561.80, 121,893,842.70 and 38,215,840.80

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Solution

The fourth proportional to 81,262,561.80, 121,893,842.70 and 38,215,840.80 is: 57,323,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262,561.80 : 121,893,842.70 = 38,215,840.80 : x
  2. Step 2: Convert to fraction form
    81,262,561.80/121,893,842.70 = 38,215,840.80/x
  3. Step 3: Cross multiply
    81,262,561.80x = 121,893,842.70 × 38,215,840.80
  4. Step 4: Simplify right side
    81,262,561.80x = 4,658,275,687,123,442
  5. Step 5: Solve for x
    x = 4,658,275,687,123,442/81,262,561.80
  6. Step 6: Final answer
    x = 57,323,761.20

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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.