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Finding the Fourth Proportional to 66,823.20, 100,234.80 and 66,362.40

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Solution

The fourth proportional to 66,823.20, 100,234.80 and 66,362.40 is: 99,543.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,823.20 : 100,234.80 = 66,362.40 : x
  2. Step 2: Convert to fraction form
    66,823.20/100,234.80 = 66,362.40/x
  3. Step 3: Cross multiply
    66,823.20x = 100,234.80 × 66,362.40
  4. Step 4: Simplify right side
    66,823.20x = 6,651,821,891.52
  5. Step 5: Solve for x
    x = 6,651,821,891.52/66,823.20
  6. Step 6: Final answer
    x = 99,543.60

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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.