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Finding the Fourth Proportional to 128,884.56, 177,856.02 and 71,526.39

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Solution

The fourth proportional to 128,884.56, 177,856.02 and 71,526.39 is: 98,703.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,884.56 : 177,856.02 = 71,526.39 : x
  2. Step 2: Convert to fraction form
    128,884.56/177,856.02 = 71,526.39/x
  3. Step 3: Cross multiply
    128,884.56x = 177,856.02 × 71,526.39
  4. Step 4: Simplify right side
    128,884.56x = 12,721,399,050.37
  5. Step 5: Solve for x
    x = 12,721,399,050.37/128,884.56
  6. Step 6: Final answer
    x = 98,703.82

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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.