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Finding the Fourth Proportional to 68,387.80, 102,592.50 and 28,945.12

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Solution

The fourth proportional to 68,387.80, 102,592.50 and 28,945.12 is: 43,422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,387.80 : 102,592.50 = 28,945.12 : x
  2. Step 2: Convert to fraction form
    68,387.80/102,592.50 = 28,945.12/x
  3. Step 3: Cross multiply
    68,387.80x = 102,592.50 × 28,945.12
  4. Step 4: Simplify right side
    68,387.80x = 2,969,552,223.60
  5. Step 5: Solve for x
    x = 2,969,552,223.60/68,387.80
  6. Step 6: Final answer
    x = 43,422.25

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1.5x scale

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.