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Finding the Fourth Proportional to 145,959.20, 218,768.70 and 67,081.40

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Solution

The fourth proportional to 145,959.20, 218,768.70 and 67,081.40 is: 100,543.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,959.20 : 218,768.70 = 67,081.40 : x
  2. Step 2: Convert to fraction form
    145,959.20/218,768.70 = 67,081.40/x
  3. Step 3: Cross multiply
    145,959.20x = 218,768.70 × 67,081.40
  4. Step 4: Simplify right side
    145,959.20x = 14,675,310,672.18
  5. Step 5: Solve for x
    x = 14,675,310,672.18/145,959.20
  6. Step 6: Final answer
    x = 100,543.92

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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.