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Finding the Fourth Proportional to 81,041.40, 111,761.64 and 53,769.42

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Solution

The fourth proportional to 81,041.40, 111,761.64 and 53,769.42 is: 74,151.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,041.40 : 111,761.64 = 53,769.42 : x
  2. Step 2: Convert to fraction form
    81,041.40/111,761.64 = 53,769.42/x
  3. Step 3: Cross multiply
    81,041.40x = 111,761.64 × 53,769.42
  4. Step 4: Simplify right side
    81,041.40x = 6,009,358,561.05
  5. Step 5: Solve for x
    x = 6,009,358,561.05/81,041.40
  6. Step 6: Final answer
    x = 74,151.71

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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.