Home / 78,182.40-117,306.81-38,740.26

Finding the Fourth Proportional to 78,182.40, 117,306.81 and 38,740.26

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Solution

The fourth proportional to 78,182.40, 117,306.81 and 38,740.26 is: 58,126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,182.40 : 117,306.81 = 38,740.26 : x
  2. Step 2: Convert to fraction form
    78,182.40/117,306.81 = 38,740.26/x
  3. Step 3: Cross multiply
    78,182.40x = 117,306.81 × 38,740.26
  4. Step 4: Simplify right side
    78,182.40x = 4,544,496,319.17
  5. Step 5: Solve for x
    x = 4,544,496,319.17/78,182.40
  6. Step 6: Final answer
    x = 58,126.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.