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Finding the Fourth Proportional to 132,405.70, 198,535.65 and 53,430.70

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Solution

The fourth proportional to 132,405.70, 198,535.65 and 53,430.70 is: 80,116.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,405.70 : 198,535.65 = 53,430.70 : x
  2. Step 2: Convert to fraction form
    132,405.70/198,535.65 = 53,430.70/x
  3. Step 3: Cross multiply
    132,405.70x = 198,535.65 × 53,430.70
  4. Step 4: Simplify right side
    132,405.70x = 10,607,898,754.46
  5. Step 5: Solve for x
    x = 10,607,898,754.46/132,405.70
  6. Step 6: Final answer
    x = 80,116.63

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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.