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Finding the Fourth Proportional to 99,608.80, 149,240.40 and 64,530.40

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Solution

The fourth proportional to 99,608.80, 149,240.40 and 64,530.40 is: 96,683.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,608.80 : 149,240.40 = 64,530.40 : x
  2. Step 2: Convert to fraction form
    99,608.80/149,240.40 = 64,530.40/x
  3. Step 3: Cross multiply
    99,608.80x = 149,240.40 × 64,530.40
  4. Step 4: Simplify right side
    99,608.80x = 9,630,542,708.16
  5. Step 5: Solve for x
    x = 9,630,542,708.16/99,608.80
  6. Step 6: Final answer
    x = 96,683.65

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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.