Home / 74,428.82-112,139.68-67,321.28

Finding the Fourth Proportional to 74,428.82, 112,139.68 and 67,321.28

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Solution

The fourth proportional to 74,428.82, 112,139.68 and 67,321.28 is: 101,430.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.82 : 112,139.68 = 67,321.28 : x
  2. Step 2: Convert to fraction form
    74,428.82/112,139.68 = 67,321.28/x
  3. Step 3: Cross multiply
    74,428.82x = 112,139.68 × 67,321.28
  4. Step 4: Simplify right side
    74,428.82x = 7,549,386,796.39
  5. Step 5: Solve for x
    x = 7,549,386,796.39/74,428.82
  6. Step 6: Final answer
    x = 101,430.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.