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Finding the Fourth Proportional to 66,168.75, 99,253.13 and 16,920.75

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Solution

The fourth proportional to 66,168.75, 99,253.13 and 16,920.75 is: 25,381.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,168.75 : 99,253.13 = 16,920.75 : x
  2. Step 2: Convert to fraction form
    66,168.75/99,253.13 = 16,920.75/x
  3. Step 3: Cross multiply
    66,168.75x = 99,253.13 × 16,920.75
  4. Step 4: Simplify right side
    66,168.75x = 1,679,437,314.84
  5. Step 5: Solve for x
    x = 1,679,437,314.84/66,168.75
  6. Step 6: Final answer
    x = 25,381.13

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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.