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Finding the Fourth Proportional to 74,363.60, 111,221.40 and 66,522.80

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Solution

The fourth proportional to 74,363.60, 111,221.40 and 66,522.80 is: 99,494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,363.60 : 111,221.40 = 66,522.80 : x
  2. Step 2: Convert to fraction form
    74,363.60/111,221.40 = 66,522.80/x
  3. Step 3: Cross multiply
    74,363.60x = 111,221.40 × 66,522.80
  4. Step 4: Simplify right side
    74,363.60x = 7,398,758,947.92
  5. Step 5: Solve for x
    x = 7,398,758,947.92/74,363.60
  6. Step 6: Final answer
    x = 99,494.36

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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.