Home / 78,079.16-107,749.28-42,269.17

Finding the Fourth Proportional to 78,079.16, 107,749.28 and 42,269.17

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Solution

The fourth proportional to 78,079.16, 107,749.28 and 42,269.17 is: 58,331.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.16 : 107,749.28 = 42,269.17 : x
  2. Step 2: Convert to fraction form
    78,079.16/107,749.28 = 42,269.17/x
  3. Step 3: Cross multiply
    78,079.16x = 107,749.28 × 42,269.17
  4. Step 4: Simplify right side
    78,079.16x = 4,554,472,633.70
  5. Step 5: Solve for x
    x = 4,554,472,633.70/78,079.16
  6. Step 6: Final answer
    x = 58,331.48

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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.