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Finding the Fourth Proportional to 128,029.01, 176,680.04 and 71,440.38

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Solution

The fourth proportional to 128,029.01, 176,680.04 and 71,440.38 is: 98,587.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.01 : 176,680.04 = 71,440.38 : x
  2. Step 2: Convert to fraction form
    128,029.01/176,680.04 = 71,440.38/x
  3. Step 3: Cross multiply
    128,029.01x = 176,680.04 × 71,440.38
  4. Step 4: Simplify right side
    128,029.01x = 12,622,088,838.81
  5. Step 5: Solve for x
    x = 12,622,088,838.81/128,029.01
  6. Step 6: Final answer
    x = 98,587.73

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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.