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Finding the Fourth Proportional to 99,630.10, 149,485.20 and 40,470.40

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Solution

The fourth proportional to 99,630.10, 149,485.20 and 40,470.40 is: 60,721.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,630.10 : 149,485.20 = 40,470.40 : x
  2. Step 2: Convert to fraction form
    99,630.10/149,485.20 = 40,470.40/x
  3. Step 3: Cross multiply
    99,630.10x = 149,485.20 × 40,470.40
  4. Step 4: Simplify right side
    99,630.10x = 6,049,725,838.08
  5. Step 5: Solve for x
    x = 6,049,725,838.08/99,630.10
  6. Step 6: Final answer
    x = 60,721.87

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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.