Home / 85,580.15-128,318.96-40,612.69

Finding the Fourth Proportional to 85,580.15, 128,318.96 and 40,612.69

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Solution

The fourth proportional to 85,580.15, 128,318.96 and 40,612.69 is: 60,894.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,580.15 : 128,318.96 = 40,612.69 : x
  2. Step 2: Convert to fraction form
    85,580.15/128,318.96 = 40,612.69/x
  3. Step 3: Cross multiply
    85,580.15x = 128,318.96 × 40,612.69
  4. Step 4: Simplify right side
    85,580.15x = 5,211,378,652.21
  5. Step 5: Solve for x
    x = 5,211,378,652.21/85,580.15
  6. Step 6: Final answer
    x = 60,894.71

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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.