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Finding the Fourth Proportional to 98,490,843.90, 147,736,265.85 and 90,554,658.30

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Solution

The fourth proportional to 98,490,843.90, 147,736,265.85 and 90,554,658.30 is: 135,831,987.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,490,843.90 : 147,736,265.85 = 90,554,658.30 : x
  2. Step 2: Convert to fraction form
    98,490,843.90/147,736,265.85 = 90,554,658.30/x
  3. Step 3: Cross multiply
    98,490,843.90x = 147,736,265.85 × 90,554,658.30
  4. Step 4: Simplify right side
    98,490,843.90x = 13,378,207,072,564,708
  5. Step 5: Solve for x
    x = 13,378,207,072,564,708/98,490,843.90
  6. Step 6: Final answer
    x = 135,831,987.45

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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.