Home / 102,420-141,378.48-68,905.44

Finding the Fourth Proportional to 102,420, 141,378.48 and 68,905.44

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Solution

The fourth proportional to 102,420, 141,378.48 and 68,905.44 is: 95,115.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,420 : 141,378.48 = 68,905.44 : x
  2. Step 2: Convert to fraction form
    102,420/141,378.48 = 68,905.44/x
  3. Step 3: Cross multiply
    102,420x = 141,378.48 × 68,905.44
  4. Step 4: Simplify right side
    102,420x = 9,741,746,370.93
  5. Step 5: Solve for x
    x = 9,741,746,370.93/102,420
  6. Step 6: Final answer
    x = 95,115.66

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1.5x scale

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.