Home / 103,711.08-155,689.64-87,275.78

Finding the Fourth Proportional to 103,711.08, 155,689.64 and 87,275.78

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Solution

The fourth proportional to 103,711.08, 155,689.64 and 87,275.78 is: 131,017.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,711.08 : 155,689.64 = 87,275.78 : x
  2. Step 2: Convert to fraction form
    103,711.08/155,689.64 = 87,275.78/x
  3. Step 3: Cross multiply
    103,711.08x = 155,689.64 × 87,275.78
  4. Step 4: Simplify right side
    103,711.08x = 13,587,933,554.09
  5. Step 5: Solve for x
    x = 13,587,933,554.09/103,711.08
  6. Step 6: Final answer
    x = 131,017.18

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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.