Home / 100,116.79-138,191.92-57,703.55

Finding the Fourth Proportional to 100,116.79, 138,191.92 and 57,703.55

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Solution

The fourth proportional to 100,116.79, 138,191.92 and 57,703.55 is: 79,648.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,116.79 : 138,191.92 = 57,703.55 : x
  2. Step 2: Convert to fraction form
    100,116.79/138,191.92 = 57,703.55/x
  3. Step 3: Cross multiply
    100,116.79x = 138,191.92 × 57,703.55
  4. Step 4: Simplify right side
    100,116.79x = 7,974,164,076.80
  5. Step 5: Solve for x
    x = 7,974,164,076.80/100,116.79
  6. Step 6: Final answer
    x = 79,648.62

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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.