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Finding the Fourth Proportional to 99,261.80, 148,911.90 and 29,143.40

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Solution

The fourth proportional to 99,261.80, 148,911.90 and 29,143.40 is: 43,720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,261.80 : 148,911.90 = 29,143.40 : x
  2. Step 2: Convert to fraction form
    99,261.80/148,911.90 = 29,143.40/x
  3. Step 3: Cross multiply
    99,261.80x = 148,911.90 × 29,143.40
  4. Step 4: Simplify right side
    99,261.80x = 4,339,799,066.46
  5. Step 5: Solve for x
    x = 4,339,799,066.46/99,261.80
  6. Step 6: Final answer
    x = 43,720.74

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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.