Home / 78,471.11-108,288.93-42,660.81

Finding the Fourth Proportional to 78,471.11, 108,288.93 and 42,660.81

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Solution

The fourth proportional to 78,471.11, 108,288.93 and 42,660.81 is: 58,871.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,471.11 : 108,288.93 = 42,660.81 : x
  2. Step 2: Convert to fraction form
    78,471.11/108,288.93 = 42,660.81/x
  3. Step 3: Cross multiply
    78,471.11x = 108,288.93 × 42,660.81
  4. Step 4: Simplify right side
    78,471.11x = 4,619,693,627.81
  5. Step 5: Solve for x
    x = 4,619,693,627.81/78,471.11
  6. Step 6: Final answer
    x = 58,871.26

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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.