Home / 100,278.18-138,385.67-54,953.15

Finding the Fourth Proportional to 100,278.18, 138,385.67 and 54,953.15

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Solution

The fourth proportional to 100,278.18, 138,385.67 and 54,953.15 is: 75,836.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278.18 : 138,385.67 = 54,953.15 : x
  2. Step 2: Convert to fraction form
    100,278.18/138,385.67 = 54,953.15/x
  3. Step 3: Cross multiply
    100,278.18x = 138,385.67 × 54,953.15
  4. Step 4: Simplify right side
    100,278.18x = 7,604,727,514.67
  5. Step 5: Solve for x
    x = 7,604,727,514.67/100,278.18
  6. Step 6: Final answer
    x = 75,836.31

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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.