Home / 128,952,083.20-193,428,124.80-103,442,915.20

Finding the Fourth Proportional to 128,952,083.20, 193,428,124.80 and 103,442,915.20

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Solution

The fourth proportional to 128,952,083.20, 193,428,124.80 and 103,442,915.20 is: 155,164,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952,083.20 : 193,428,124.80 = 103,442,915.20 : x
  2. Step 2: Convert to fraction form
    128,952,083.20/193,428,124.80 = 103,442,915.20/x
  3. Step 3: Cross multiply
    128,952,083.20x = 193,428,124.80 × 103,442,915.20
  4. Step 4: Simplify right side
    128,952,083.20x = 20,008,769,110,981,420
  5. Step 5: Solve for x
    x = 20,008,769,110,981,420/128,952,083.20
  6. Step 6: Final answer
    x = 155,164,372.80

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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.