Home / 118,685.28-163,780.40-64,972.56

Finding the Fourth Proportional to 118,685.28, 163,780.40 and 64,972.56

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Solution

The fourth proportional to 118,685.28, 163,780.40 and 64,972.56 is: 89,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,685.28 : 163,780.40 = 64,972.56 : x
  2. Step 2: Convert to fraction form
    118,685.28/163,780.40 = 64,972.56/x
  3. Step 3: Cross multiply
    118,685.28x = 163,780.40 × 64,972.56
  4. Step 4: Simplify right side
    118,685.28x = 10,641,231,865.82
  5. Step 5: Solve for x
    x = 10,641,231,865.82/118,685.28
  6. Step 6: Final answer
    x = 89,659.24

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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.