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Finding the Fourth Proportional to 100,688.40, 138,934.44 and 58,250.88

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Solution

The fourth proportional to 100,688.40, 138,934.44 and 58,250.88 is: 80,377.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,688.40 : 138,934.44 = 58,250.88 : x
  2. Step 2: Convert to fraction form
    100,688.40/138,934.44 = 58,250.88/x
  3. Step 3: Cross multiply
    100,688.40x = 138,934.44 × 58,250.88
  4. Step 4: Simplify right side
    100,688.40x = 8,093,053,392.31
  5. Step 5: Solve for x
    x = 8,093,053,392.31/100,688.40
  6. Step 6: Final answer
    x = 80,377.22

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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.