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Finding the Fourth Proportional to 199,772.10, 299,658.15 and 81,378.90

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Solution

The fourth proportional to 199,772.10, 299,658.15 and 81,378.90 is: 122,068.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,772.10 : 299,658.15 = 81,378.90 : x
  2. Step 2: Convert to fraction form
    199,772.10/299,658.15 = 81,378.90/x
  3. Step 3: Cross multiply
    199,772.10x = 299,658.15 × 81,378.90
  4. Step 4: Simplify right side
    199,772.10x = 24,385,850,623.04
  5. Step 5: Solve for x
    x = 24,385,850,623.04/199,772.10
  6. Step 6: Final answer
    x = 122,068.35

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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.