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Finding the Fourth Proportional to 99,814.80, 149,722.20 and 64,385.40

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Solution

The fourth proportional to 99,814.80, 149,722.20 and 64,385.40 is: 96,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,814.80 : 149,722.20 = 64,385.40 : x
  2. Step 2: Convert to fraction form
    99,814.80/149,722.20 = 64,385.40/x
  3. Step 3: Cross multiply
    99,814.80x = 149,722.20 × 64,385.40
  4. Step 4: Simplify right side
    99,814.80x = 9,639,923,735.88
  5. Step 5: Solve for x
    x = 9,639,923,735.88/99,814.80
  6. Step 6: Final answer
    x = 96,578.10

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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.