Home / 85,549.20-128,323.80-23,219.70

Finding the Fourth Proportional to 85,549.20, 128,323.80 and 23,219.70

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Solution

The fourth proportional to 85,549.20, 128,323.80 and 23,219.70 is: 34,829.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,549.20 : 128,323.80 = 23,219.70 : x
  2. Step 2: Convert to fraction form
    85,549.20/128,323.80 = 23,219.70/x
  3. Step 3: Cross multiply
    85,549.20x = 128,323.80 × 23,219.70
  4. Step 4: Simplify right side
    85,549.20x = 2,979,640,138.86
  5. Step 5: Solve for x
    x = 2,979,640,138.86/85,549.20
  6. Step 6: Final answer
    x = 34,829.55

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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.