Home / 138,036,302.40-206,802,511.20-84,120,628.80

Finding the Fourth Proportional to 138,036,302.40, 206,802,511.20 and 84,120,628.80

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Solution

The fourth proportional to 138,036,302.40, 206,802,511.20 and 84,120,628.80 is: 126,027,407.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,036,302.40 : 206,802,511.20 = 84,120,628.80 : x
  2. Step 2: Convert to fraction form
    138,036,302.40/206,802,511.20 = 84,120,628.80/x
  3. Step 3: Cross multiply
    138,036,302.40x = 206,802,511.20 × 84,120,628.80
  4. Step 4: Simplify right side
    138,036,302.40x = 17,396,357,279,563,040
  5. Step 5: Solve for x
    x = 17,396,357,279,563,040/138,036,302.40
  6. Step 6: Final answer
    x = 126,027,407.12

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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.