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Finding the Fourth Proportional to 89,376.70, 134,019.20 and 47,279.50

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Solution

The fourth proportional to 89,376.70, 134,019.20 and 47,279.50 is: 70,895.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,376.70 : 134,019.20 = 47,279.50 : x
  2. Step 2: Convert to fraction form
    89,376.70/134,019.20 = 47,279.50/x
  3. Step 3: Cross multiply
    89,376.70x = 134,019.20 × 47,279.50
  4. Step 4: Simplify right side
    89,376.70x = 6,336,360,766.40
  5. Step 5: Solve for x
    x = 6,336,360,766.40/89,376.70
  6. Step 6: Final answer
    x = 70,895.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.