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Finding the Fourth Proportional to 63,138.18, 87,506.91 and 61,957.20

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Solution

The fourth proportional to 63,138.18, 87,506.91 and 61,957.20 is: 85,870.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,138.18 : 87,506.91 = 61,957.20 : x
  2. Step 2: Convert to fraction form
    63,138.18/87,506.91 = 61,957.20/x
  3. Step 3: Cross multiply
    63,138.18x = 87,506.91 × 61,957.20
  4. Step 4: Simplify right side
    63,138.18x = 5,421,683,124.25
  5. Step 5: Solve for x
    x = 5,421,683,124.25/63,138.18
  6. Step 6: Final answer
    x = 85,870.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.