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Finding the Fourth Proportional to 99,648,049.20, 149,472,073.80 and 90,719,840.40

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Solution

The fourth proportional to 99,648,049.20, 149,472,073.80 and 90,719,840.40 is: 136,079,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,648,049.20 : 149,472,073.80 = 90,719,840.40 : x
  2. Step 2: Convert to fraction form
    99,648,049.20/149,472,073.80 = 90,719,840.40/x
  3. Step 3: Cross multiply
    99,648,049.20x = 149,472,073.80 × 90,719,840.40
  4. Step 4: Simplify right side
    99,648,049.20x = 13,560,082,679,393,024
  5. Step 5: Solve for x
    x = 13,560,082,679,393,024/99,648,049.20
  6. Step 6: Final answer
    x = 136,079,760.60

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1.5x scale

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.