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Finding the Fourth Proportional to 147,489, 203,534.82 and 80,421.16

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Solution

The fourth proportional to 147,489, 203,534.82 and 80,421.16 is: 110,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,489 : 203,534.82 = 80,421.16 : x
  2. Step 2: Convert to fraction form
    147,489/203,534.82 = 80,421.16/x
  3. Step 3: Cross multiply
    147,489x = 203,534.82 × 80,421.16
  4. Step 4: Simplify right side
    147,489x = 16,368,506,324.79
  5. Step 5: Solve for x
    x = 16,368,506,324.79/147,489
  6. Step 6: Final answer
    x = 110,981.20

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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.