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Finding the Fourth Proportional to 85,881.20, 128,821.80 and 23,551.70

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Solution

The fourth proportional to 85,881.20, 128,821.80 and 23,551.70 is: 35,327.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,881.20 : 128,821.80 = 23,551.70 : x
  2. Step 2: Convert to fraction form
    85,881.20/128,821.80 = 23,551.70/x
  3. Step 3: Cross multiply
    85,881.20x = 128,821.80 × 23,551.70
  4. Step 4: Simplify right side
    85,881.20x = 3,033,972,387.06
  5. Step 5: Solve for x
    x = 3,033,972,387.06/85,881.20
  6. Step 6: Final answer
    x = 35,327.55

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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.