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Finding the Fourth Proportional to 147,592.72, 203,743.92 and 99,990.64

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Solution

The fourth proportional to 147,592.72, 203,743.92 and 99,990.64 is: 138,031.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,592.72 : 203,743.92 = 99,990.64 : x
  2. Step 2: Convert to fraction form
    147,592.72/203,743.92 = 99,990.64/x
  3. Step 3: Cross multiply
    147,592.72x = 203,743.92 × 99,990.64
  4. Step 4: Simplify right side
    147,592.72x = 20,372,484,956.91
  5. Step 5: Solve for x
    x = 20,372,484,956.91/147,592.72
  6. Step 6: Final answer
    x = 138,031.77

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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.