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Finding the Fourth Proportional to 128,067.32, 176,749.62 and 71,490.44

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Solution

The fourth proportional to 128,067.32, 176,749.62 and 71,490.44 is: 98,666.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,067.32 : 176,749.62 = 71,490.44 : x
  2. Step 2: Convert to fraction form
    128,067.32/176,749.62 = 71,490.44/x
  3. Step 3: Cross multiply
    128,067.32x = 176,749.62 × 71,490.44
  4. Step 4: Simplify right side
    128,067.32x = 12,635,908,103.63
  5. Step 5: Solve for x
    x = 12,635,908,103.63/128,067.32
  6. Step 6: Final answer
    x = 98,666.14

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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.