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Finding the Fourth Proportional to 78,711.48, 108,623.57 and 42,903.27

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Solution

The fourth proportional to 78,711.48, 108,623.57 and 42,903.27 is: 59,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,711.48 : 108,623.57 = 42,903.27 : x
  2. Step 2: Convert to fraction form
    78,711.48/108,623.57 = 42,903.27/x
  3. Step 3: Cross multiply
    78,711.48x = 108,623.57 × 42,903.27
  4. Step 4: Simplify right side
    78,711.48x = 4,660,306,137.56
  5. Step 5: Solve for x
    x = 4,660,306,137.56/78,711.48
  6. Step 6: Final answer
    x = 59,207.45

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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.