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Finding the Fourth Proportional to 81,403.44, 121,957.50 and 60,108.87

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Solution

The fourth proportional to 81,403.44, 121,957.50 and 60,108.87 is: 90,054.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,403.44 : 121,957.50 = 60,108.87 : x
  2. Step 2: Convert to fraction form
    81,403.44/121,957.50 = 60,108.87/x
  3. Step 3: Cross multiply
    81,403.44x = 121,957.50 × 60,108.87
  4. Step 4: Simplify right side
    81,403.44x = 7,330,727,513.03
  5. Step 5: Solve for x
    x = 7,330,727,513.03/81,403.44
  6. Step 6: Final answer
    x = 90,054.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.