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Finding the Fourth Proportional to 100,552.32, 138,758.40 and 55,843.20

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Solution

The fourth proportional to 100,552.32, 138,758.40 and 55,843.20 is: 77,061.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,552.32 : 138,758.40 = 55,843.20 : x
  2. Step 2: Convert to fraction form
    100,552.32/138,758.40 = 55,843.20/x
  3. Step 3: Cross multiply
    100,552.32x = 138,758.40 × 55,843.20
  4. Step 4: Simplify right side
    100,552.32x = 7,748,713,082.88
  5. Step 5: Solve for x
    x = 7,748,713,082.88/100,552.32
  6. Step 6: Final answer
    x = 77,061.50

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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.