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Finding the Fourth Proportional to 128,027.98, 176,696.40 and 71,443

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Solution

The fourth proportional to 128,027.98, 176,696.40 and 71,443 is: 98,601.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,027.98 : 176,696.40 = 71,443 : x
  2. Step 2: Convert to fraction form
    128,027.98/176,696.40 = 71,443/x
  3. Step 3: Cross multiply
    128,027.98x = 176,696.40 × 71,443
  4. Step 4: Simplify right side
    128,027.98x = 12,623,720,905.20
  5. Step 5: Solve for x
    x = 12,623,720,905.20/128,027.98
  6. Step 6: Final answer
    x = 98,601.27

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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.