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Finding the Fourth Proportional to 135,348.12, 186,737.46 and 78,748.56

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Solution

The fourth proportional to 135,348.12, 186,737.46 and 78,748.56 is: 108,648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,348.12 : 186,737.46 = 78,748.56 : x
  2. Step 2: Convert to fraction form
    135,348.12/186,737.46 = 78,748.56/x
  3. Step 3: Cross multiply
    135,348.12x = 186,737.46 × 78,748.56
  4. Step 4: Simplify right side
    135,348.12x = 14,705,306,073.06
  5. Step 5: Solve for x
    x = 14,705,306,073.06/135,348.12
  6. Step 6: Final answer
    x = 108,648.03

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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.