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Finding the Fourth Proportional to 98,490,857.90, 147,736,286.85 and 90,554,672.30

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Solution

The fourth proportional to 98,490,857.90, 147,736,286.85 and 90,554,672.30 is: 135,832,008.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,490,857.90 : 147,736,286.85 = 90,554,672.30 : x
  2. Step 2: Convert to fraction form
    98,490,857.90/147,736,286.85 = 90,554,672.30/x
  3. Step 3: Cross multiply
    98,490,857.90x = 147,736,286.85 × 90,554,672.30
  4. Step 4: Simplify right side
    98,490,857.90x = 13,378,211,042,520,548
  5. Step 5: Solve for x
    x = 13,378,211,042,520,548/98,490,857.90
  6. Step 6: Final answer
    x = 135,832,008.45

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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.