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Finding the Fourth Proportional to 98,981,143.40, 138,860,578.90 and 98,981,143.40

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Solution

The fourth proportional to 98,981,143.40, 138,860,578.90 and 98,981,143.40 is: 138,860,578.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,981,143.40 : 138,860,578.90 = 98,981,143.40 : x
  2. Step 2: Convert to fraction form
    98,981,143.40/138,860,578.90 = 98,981,143.40/x
  3. Step 3: Cross multiply
    98,981,143.40x = 138,860,578.90 × 98,981,143.40
  4. Step 4: Simplify right side
    98,981,143.40x = 13,744,578,872,707,916
  5. Step 5: Solve for x
    x = 13,744,578,872,707,916/98,981,143.40
  6. Step 6: Final answer
    x = 138,860,578.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.