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Finding the Fourth Proportional to 148,630.72, 205,157.28 and 100,302.88

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Solution

The fourth proportional to 148,630.72, 205,157.28 and 100,302.88 is: 138,449.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,630.72 : 205,157.28 = 100,302.88 : x
  2. Step 2: Convert to fraction form
    148,630.72/205,157.28 = 100,302.88/x
  3. Step 3: Cross multiply
    148,630.72x = 205,157.28 × 100,302.88
  4. Step 4: Simplify right side
    148,630.72x = 20,577,866,036.97
  5. Step 5: Solve for x
    x = 20,577,866,036.97/148,630.72
  6. Step 6: Final answer
    x = 138,449.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.