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Finding the Fourth Proportional to 85,844.80, 128,805.60 and 39,073.60

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Solution

The fourth proportional to 85,844.80, 128,805.60 and 39,073.60 is: 58,627.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,844.80 : 128,805.60 = 39,073.60 : x
  2. Step 2: Convert to fraction form
    85,844.80/128,805.60 = 39,073.60/x
  3. Step 3: Cross multiply
    85,844.80x = 128,805.60 × 39,073.60
  4. Step 4: Simplify right side
    85,844.80x = 5,032,898,492.16
  5. Step 5: Solve for x
    x = 5,032,898,492.16/85,844.80
  6. Step 6: Final answer
    x = 58,627.88

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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.