Home / 142,118.23-196,121.95-78,454.66

Finding the Fourth Proportional to 142,118.23, 196,121.95 and 78,454.66

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Solution

The fourth proportional to 142,118.23, 196,121.95 and 78,454.66 is: 108,266.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,118.23 : 196,121.95 = 78,454.66 : x
  2. Step 2: Convert to fraction form
    142,118.23/196,121.95 = 78,454.66/x
  3. Step 3: Cross multiply
    142,118.23x = 196,121.95 × 78,454.66
  4. Step 4: Simplify right side
    142,118.23x = 15,386,680,415.48
  5. Step 5: Solve for x
    x = 15,386,680,415.48/142,118.23
  6. Step 6: Final answer
    x = 108,266.76

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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.