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Finding the Fourth Proportional to 132,570.76, 198,465.40 and 87,508.98

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Solution

The fourth proportional to 132,570.76, 198,465.40 and 87,508.98 is: 131,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,570.76 : 198,465.40 = 87,508.98 : x
  2. Step 2: Convert to fraction form
    132,570.76/198,465.40 = 87,508.98/x
  3. Step 3: Cross multiply
    132,570.76x = 198,465.40 × 87,508.98
  4. Step 4: Simplify right side
    132,570.76x = 17,367,504,719.29
  5. Step 5: Solve for x
    x = 17,367,504,719.29/132,570.76
  6. Step 6: Final answer
    x = 131,005.55

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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.