Home / 100,200.24-138,275.85-54,878.07

Finding the Fourth Proportional to 100,200.24, 138,275.85 and 54,878.07

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Solution

The fourth proportional to 100,200.24, 138,275.85 and 54,878.07 is: 75,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,200.24 : 138,275.85 = 54,878.07 : x
  2. Step 2: Convert to fraction form
    100,200.24/138,275.85 = 54,878.07/x
  3. Step 3: Cross multiply
    100,200.24x = 138,275.85 × 54,878.07
  4. Step 4: Simplify right side
    100,200.24x = 7,588,311,775.61
  5. Step 5: Solve for x
    x = 7,588,311,775.61/100,200.24
  6. Step 6: Final answer
    x = 75,731.47

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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.