Home / 78,731.10-108,527.67-62,790.30

Finding the Fourth Proportional to 78,731.10, 108,527.67 and 62,790.30

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Solution

The fourth proportional to 78,731.10, 108,527.67 and 62,790.30 is: 86,553.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,731.10 : 108,527.67 = 62,790.30 : x
  2. Step 2: Convert to fraction form
    78,731.10/108,527.67 = 62,790.30/x
  3. Step 3: Cross multiply
    78,731.10x = 108,527.67 × 62,790.30
  4. Step 4: Simplify right side
    78,731.10x = 6,814,484,957.60
  5. Step 5: Solve for x
    x = 6,814,484,957.60/78,731.10
  6. Step 6: Final answer
    x = 86,553.92

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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.