Home / 78,957.56-108,983.40-48,747.80

Finding the Fourth Proportional to 78,957.56, 108,983.40 and 48,747.80

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Solution

The fourth proportional to 78,957.56, 108,983.40 and 48,747.80 is: 67,285.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,957.56 : 108,983.40 = 48,747.80 : x
  2. Step 2: Convert to fraction form
    78,957.56/108,983.40 = 48,747.80/x
  3. Step 3: Cross multiply
    78,957.56x = 108,983.40 × 48,747.80
  4. Step 4: Simplify right side
    78,957.56x = 5,312,700,986.52
  5. Step 5: Solve for x
    x = 5,312,700,986.52/78,957.56
  6. Step 6: Final answer
    x = 67,285.53

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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.