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Finding the Fourth Proportional to 66,102.35, 99,132.46 and 21,718.80

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Solution

The fourth proportional to 66,102.35, 99,132.46 and 21,718.80 is: 32,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,102.35 : 99,132.46 = 21,718.80 : x
  2. Step 2: Convert to fraction form
    66,102.35/99,132.46 = 21,718.80/x
  3. Step 3: Cross multiply
    66,102.35x = 99,132.46 × 21,718.80
  4. Step 4: Simplify right side
    66,102.35x = 2,153,038,017.95
  5. Step 5: Solve for x
    x = 2,153,038,017.95/66,102.35
  6. Step 6: Final answer
    x = 32,571.28

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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.