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Finding the Fourth Proportional to 132,471.64, 182,809.12 and 72,040.98

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Solution

The fourth proportional to 132,471.64, 182,809.12 and 72,040.98 is: 99,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,471.64 : 182,809.12 = 72,040.98 : x
  2. Step 2: Convert to fraction form
    132,471.64/182,809.12 = 72,040.98/x
  3. Step 3: Cross multiply
    132,471.64x = 182,809.12 × 72,040.98
  4. Step 4: Simplify right side
    132,471.64x = 13,169,747,769.94
  5. Step 5: Solve for x
    x = 13,169,747,769.94/132,471.64
  6. Step 6: Final answer
    x = 99,415.60

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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.