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Finding the Fourth Proportional to 78,872.63, 108,731.18 and 48,637.65

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Solution

The fourth proportional to 78,872.63, 108,731.18 and 48,637.65 is: 67,050.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,872.63 : 108,731.18 = 48,637.65 : x
  2. Step 2: Convert to fraction form
    78,872.63/108,731.18 = 48,637.65/x
  3. Step 3: Cross multiply
    78,872.63x = 108,731.18 × 48,637.65
  4. Step 4: Simplify right side
    78,872.63x = 5,288,429,606.26
  5. Step 5: Solve for x
    x = 5,288,429,606.26/78,872.63
  6. Step 6: Final answer
    x = 67,050.25

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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.