Home / 85,400.10-128,112.30-26,226.90

Finding the Fourth Proportional to 85,400.10, 128,112.30 and 26,226.90

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Solution

The fourth proportional to 85,400.10, 128,112.30 and 26,226.90 is: 39,344.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,400.10 : 128,112.30 = 26,226.90 : x
  2. Step 2: Convert to fraction form
    85,400.10/128,112.30 = 26,226.90/x
  3. Step 3: Cross multiply
    85,400.10x = 128,112.30 × 26,226.90
  4. Step 4: Simplify right side
    85,400.10x = 3,359,988,480.87
  5. Step 5: Solve for x
    x = 3,359,988,480.87/85,400.10
  6. Step 6: Final answer
    x = 39,344.08

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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.