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Finding the Fourth Proportional to 88,191.55, 121,655.87 and 55,866.97

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Solution

The fourth proportional to 88,191.55, 121,655.87 and 55,866.97 is: 77,065.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,191.55 : 121,655.87 = 55,866.97 : x
  2. Step 2: Convert to fraction form
    88,191.55/121,655.87 = 55,866.97/x
  3. Step 3: Cross multiply
    88,191.55x = 121,655.87 × 55,866.97
  4. Step 4: Simplify right side
    88,191.55x = 6,796,544,560.28
  5. Step 5: Solve for x
    x = 6,796,544,560.28/88,191.55
  6. Step 6: Final answer
    x = 77,065.71

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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.