Home / 128,047.20-176,721.85-71,470.32

Finding the Fourth Proportional to 128,047.20, 176,721.85 and 71,470.32

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Solution

The fourth proportional to 128,047.20, 176,721.85 and 71,470.32 is: 98,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.20 : 176,721.85 = 71,470.32 : x
  2. Step 2: Convert to fraction form
    128,047.20/176,721.85 = 71,470.32/x
  3. Step 3: Cross multiply
    128,047.20x = 176,721.85 × 71,470.32
  4. Step 4: Simplify right side
    128,047.20x = 12,630,367,170.49
  5. Step 5: Solve for x
    x = 12,630,367,170.49/128,047.20
  6. Step 6: Final answer
    x = 98,638.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.