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Finding the Fourth Proportional to 52,113.88, 78,169.72 and 12,671.20

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Solution

The fourth proportional to 52,113.88, 78,169.72 and 12,671.20 is: 19,006.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,113.88 : 78,169.72 = 12,671.20 : x
  2. Step 2: Convert to fraction form
    52,113.88/78,169.72 = 12,671.20/x
  3. Step 3: Cross multiply
    52,113.88x = 78,169.72 × 12,671.20
  4. Step 4: Simplify right side
    52,113.88x = 990,504,156.06
  5. Step 5: Solve for x
    x = 990,504,156.06/52,113.88
  6. Step 6: Final answer
    x = 19,006.53

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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.