Home / 102,681.28-153,863.16-80,138.52

Finding the Fourth Proportional to 102,681.28, 153,863.16 and 80,138.52

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Solution

The fourth proportional to 102,681.28, 153,863.16 and 80,138.52 is: 120,083.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,681.28 : 153,863.16 = 80,138.52 : x
  2. Step 2: Convert to fraction form
    102,681.28/153,863.16 = 80,138.52/x
  3. Step 3: Cross multiply
    102,681.28x = 153,863.16 × 80,138.52
  4. Step 4: Simplify right side
    102,681.28x = 12,330,365,924.92
  5. Step 5: Solve for x
    x = 12,330,365,924.92/102,681.28
  6. Step 6: Final answer
    x = 120,083.87

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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.