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Finding the Fourth Proportional to 78,683.72, 108,579.78 and 44,687.72

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Solution

The fourth proportional to 78,683.72, 108,579.78 and 44,687.72 is: 61,666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.72 : 108,579.78 = 44,687.72 : x
  2. Step 2: Convert to fraction form
    78,683.72/108,579.78 = 44,687.72/x
  3. Step 3: Cross multiply
    78,683.72x = 108,579.78 × 44,687.72
  4. Step 4: Simplify right side
    78,683.72x = 4,852,182,806.30
  5. Step 5: Solve for x
    x = 4,852,182,806.30/78,683.72
  6. Step 6: Final answer
    x = 61,666.92

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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.