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Finding the Fourth Proportional to 74,471.40, 102,770.28 and 42,640.20

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Solution

The fourth proportional to 74,471.40, 102,770.28 and 42,640.20 is: 58,843.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,471.40 : 102,770.28 = 42,640.20 : x
  2. Step 2: Convert to fraction form
    74,471.40/102,770.28 = 42,640.20/x
  3. Step 3: Cross multiply
    74,471.40x = 102,770.28 × 42,640.20
  4. Step 4: Simplify right side
    74,471.40x = 4,382,145,293.26
  5. Step 5: Solve for x
    x = 4,382,145,293.26/74,471.40
  6. Step 6: Final answer
    x = 58,843.33

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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.