Home / 100,630.81-138,872.14-57,610.13

Finding the Fourth Proportional to 100,630.81, 138,872.14 and 57,610.13

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Solution

The fourth proportional to 100,630.81, 138,872.14 and 57,610.13 is: 79,502.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,630.81 : 138,872.14 = 57,610.13 : x
  2. Step 2: Convert to fraction form
    100,630.81/138,872.14 = 57,610.13/x
  3. Step 3: Cross multiply
    100,630.81x = 138,872.14 × 57,610.13
  4. Step 4: Simplify right side
    100,630.81x = 8,000,442,038.78
  5. Step 5: Solve for x
    x = 8,000,442,038.78/100,630.81
  6. Step 6: Final answer
    x = 79,502.91

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1.5x scale

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.