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Finding the Fourth Proportional to 85,854.80, 128,780.17 and 23,525.30

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Solution

The fourth proportional to 85,854.80, 128,780.17 and 23,525.30 is: 35,287.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,854.80 : 128,780.17 = 23,525.30 : x
  2. Step 2: Convert to fraction form
    85,854.80/128,780.17 = 23,525.30/x
  3. Step 3: Cross multiply
    85,854.80x = 128,780.17 × 23,525.30
  4. Step 4: Simplify right side
    85,854.80x = 3,029,592,133.30
  5. Step 5: Solve for x
    x = 3,029,592,133.30/85,854.80
  6. Step 6: Final answer
    x = 35,287.39

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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.