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Finding the Fourth Proportional to 128,248.03, 176,978.64 and 71,659.39

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Solution

The fourth proportional to 128,248.03, 176,978.64 and 71,659.39 is: 98,887.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,248.03 : 176,978.64 = 71,659.39 : x
  2. Step 2: Convert to fraction form
    128,248.03/176,978.64 = 71,659.39/x
  3. Step 3: Cross multiply
    128,248.03x = 176,978.64 × 71,659.39
  4. Step 4: Simplify right side
    128,248.03x = 12,682,181,385.43
  5. Step 5: Solve for x
    x = 12,682,181,385.43/128,248.03
  6. Step 6: Final answer
    x = 98,887.92

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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.