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Finding the Fourth Proportional to 99,390.40, 149,042.40 and 29,255.20

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Solution

The fourth proportional to 99,390.40, 149,042.40 and 29,255.20 is: 43,870.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,390.40 : 149,042.40 = 29,255.20 : x
  2. Step 2: Convert to fraction form
    99,390.40/149,042.40 = 29,255.20/x
  3. Step 3: Cross multiply
    99,390.40x = 149,042.40 × 29,255.20
  4. Step 4: Simplify right side
    99,390.40x = 4,360,265,220.48
  5. Step 5: Solve for x
    x = 4,360,265,220.48/99,390.40
  6. Step 6: Final answer
    x = 43,870.08

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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.