Home / 100,019.28-138,041.10-57,577.44

Finding the Fourth Proportional to 100,019.28, 138,041.10 and 57,577.44

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Solution

The fourth proportional to 100,019.28, 138,041.10 and 57,577.44 is: 79,465.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,019.28 : 138,041.10 = 57,577.44 : x
  2. Step 2: Convert to fraction form
    100,019.28/138,041.10 = 57,577.44/x
  3. Step 3: Cross multiply
    100,019.28x = 138,041.10 × 57,577.44
  4. Step 4: Simplify right side
    100,019.28x = 7,948,053,152.78
  5. Step 5: Solve for x
    x = 7,948,053,152.78/100,019.28
  6. Step 6: Final answer
    x = 79,465.21

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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.