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Finding the Fourth Proportional to 64,400.90, 96,601.35 and 43,405.70

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Solution

The fourth proportional to 64,400.90, 96,601.35 and 43,405.70 is: 65,108.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,400.90 : 96,601.35 = 43,405.70 : x
  2. Step 2: Convert to fraction form
    64,400.90/96,601.35 = 43,405.70/x
  3. Step 3: Cross multiply
    64,400.90x = 96,601.35 × 43,405.70
  4. Step 4: Simplify right side
    64,400.90x = 4,193,049,217.70
  5. Step 5: Solve for x
    x = 4,193,049,217.70/64,400.90
  6. Step 6: Final answer
    x = 65,108.55

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1.5x scale

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.