Home / 85,756.25-128,565.66-40,755.02

Finding the Fourth Proportional to 85,756.25, 128,565.66 and 40,755.02

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Solution

The fourth proportional to 85,756.25, 128,565.66 and 40,755.02 is: 61,099.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,756.25 : 128,565.66 = 40,755.02 : x
  2. Step 2: Convert to fraction form
    85,756.25/128,565.66 = 40,755.02/x
  3. Step 3: Cross multiply
    85,756.25x = 128,565.66 × 40,755.02
  4. Step 4: Simplify right side
    85,756.25x = 5,239,695,401.78
  5. Step 5: Solve for x
    x = 5,239,695,401.78/85,756.25
  6. Step 6: Final answer
    x = 61,099.87

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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.