Home / 81,638.12-112,683.88-47,654.58

Finding the Fourth Proportional to 81,638.12, 112,683.88 and 47,654.58

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Solution

The fourth proportional to 81,638.12, 112,683.88 and 47,654.58 is: 65,776.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,638.12 : 112,683.88 = 47,654.58 : x
  2. Step 2: Convert to fraction form
    81,638.12/112,683.88 = 47,654.58/x
  3. Step 3: Cross multiply
    81,638.12x = 112,683.88 × 47,654.58
  4. Step 4: Simplify right side
    81,638.12x = 5,369,902,974.17
  5. Step 5: Solve for x
    x = 5,369,902,974.17/81,638.12
  6. Step 6: Final answer
    x = 65,776.91

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1.5x scale

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.