Home / 90,157.36-124,519.28-61,427.20

Finding the Fourth Proportional to 90,157.36, 124,519.28 and 61,427.20

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Solution

The fourth proportional to 90,157.36, 124,519.28 and 61,427.20 is: 84,839.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,157.36 : 124,519.28 = 61,427.20 : x
  2. Step 2: Convert to fraction form
    90,157.36/124,519.28 = 61,427.20/x
  3. Step 3: Cross multiply
    90,157.36x = 124,519.28 × 61,427.20
  4. Step 4: Simplify right side
    90,157.36x = 7,648,870,716.42
  5. Step 5: Solve for x
    x = 7,648,870,716.42/90,157.36
  6. Step 6: Final answer
    x = 84,839.12

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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.