Home / 85,579.12-128,319.27-26,398.90

Finding the Fourth Proportional to 85,579.12, 128,319.27 and 26,398.90

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Solution

The fourth proportional to 85,579.12, 128,319.27 and 26,398.90 is: 39,583.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,579.12 : 128,319.27 = 26,398.90 : x
  2. Step 2: Convert to fraction form
    85,579.12/128,319.27 = 26,398.90/x
  3. Step 3: Cross multiply
    85,579.12x = 128,319.27 × 26,398.90
  4. Step 4: Simplify right side
    85,579.12x = 3,387,487,576.80
  5. Step 5: Solve for x
    x = 3,387,487,576.80/85,579.12
  6. Step 6: Final answer
    x = 39,583.11

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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.