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Finding the Fourth Proportional to 89,834.76, 134,751.78 and 70,129.80

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Solution

The fourth proportional to 89,834.76, 134,751.78 and 70,129.80 is: 105,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,834.76 : 134,751.78 = 70,129.80 : x
  2. Step 2: Convert to fraction form
    89,834.76/134,751.78 = 70,129.80/x
  3. Step 3: Cross multiply
    89,834.76x = 134,751.78 × 70,129.80
  4. Step 4: Simplify right side
    89,834.76x = 9,450,115,381.04
  5. Step 5: Solve for x
    x = 9,450,115,381.04/89,834.76
  6. Step 6: Final answer
    x = 105,194.42

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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.