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Finding the Fourth Proportional to 78,683.70, 108,574.10 and 44,679.90

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Solution

The fourth proportional to 78,683.70, 108,574.10 and 44,679.90 is: 61,652.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.70 : 108,574.10 = 44,679.90 : x
  2. Step 2: Convert to fraction form
    78,683.70/108,574.10 = 44,679.90/x
  3. Step 3: Cross multiply
    78,683.70x = 108,574.10 × 44,679.90
  4. Step 4: Simplify right side
    78,683.70x = 4,851,079,930.59
  5. Step 5: Solve for x
    x = 4,851,079,930.59/78,683.70
  6. Step 6: Final answer
    x = 61,652.92

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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.