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Finding the Fourth Proportional to 170,661.20, 256,119.80 and 87,512.40

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Solution

The fourth proportional to 170,661.20, 256,119.80 and 87,512.40 is: 131,334.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,661.20 : 256,119.80 = 87,512.40 : x
  2. Step 2: Convert to fraction form
    170,661.20/256,119.80 = 87,512.40/x
  3. Step 3: Cross multiply
    170,661.20x = 256,119.80 × 87,512.40
  4. Step 4: Simplify right side
    170,661.20x = 22,413,658,385.52
  5. Step 5: Solve for x
    x = 22,413,658,385.52/170,661.20
  6. Step 6: Final answer
    x = 131,334.24

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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.