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Finding the Fourth Proportional to 78,683.80, 108,721.74 and 62,898.52

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Solution

The fourth proportional to 78,683.80, 108,721.74 and 62,898.52 is: 86,910.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.80 : 108,721.74 = 62,898.52 : x
  2. Step 2: Convert to fraction form
    78,683.80/108,721.74 = 62,898.52/x
  3. Step 3: Cross multiply
    78,683.80x = 108,721.74 × 62,898.52
  4. Step 4: Simplify right side
    78,683.80x = 6,838,436,537.82
  5. Step 5: Solve for x
    x = 6,838,436,537.82/78,683.80
  6. Step 6: Final answer
    x = 86,910.35

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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.