Home / 138,476,721.60-207,715,082.40-66,813,105.60

Finding the Fourth Proportional to 138,476,721.60, 207,715,082.40 and 66,813,105.60

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Solution

The fourth proportional to 138,476,721.60, 207,715,082.40 and 66,813,105.60 is: 100,219,658.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,476,721.60 : 207,715,082.40 = 66,813,105.60 : x
  2. Step 2: Convert to fraction form
    138,476,721.60/207,715,082.40 = 66,813,105.60/x
  3. Step 3: Cross multiply
    138,476,721.60x = 207,715,082.40 × 66,813,105.60
  4. Step 4: Simplify right side
    138,476,721.60x = 13,878,089,735,103,902
  5. Step 5: Solve for x
    x = 13,878,089,735,103,902/138,476,721.60
  6. Step 6: Final answer
    x = 100,219,658.40

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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.