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Finding the Fourth Proportional to 89,530.80, 134,358.30 and 67,390.80

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Solution

The fourth proportional to 89,530.80, 134,358.30 and 67,390.80 is: 101,132.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,530.80 : 134,358.30 = 67,390.80 : x
  2. Step 2: Convert to fraction form
    89,530.80/134,358.30 = 67,390.80/x
  3. Step 3: Cross multiply
    89,530.80x = 134,358.30 × 67,390.80
  4. Step 4: Simplify right side
    89,530.80x = 9,054,513,323.64
  5. Step 5: Solve for x
    x = 9,054,513,323.64/89,530.80
  6. Step 6: Final answer
    x = 101,132.94

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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.