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Finding the Fourth Proportional to 66,209.20, 99,313.80 and 65,748.40

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Solution

The fourth proportional to 66,209.20, 99,313.80 and 65,748.40 is: 98,622.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,209.20 : 99,313.80 = 65,748.40 : x
  2. Step 2: Convert to fraction form
    66,209.20/99,313.80 = 65,748.40/x
  3. Step 3: Cross multiply
    66,209.20x = 99,313.80 × 65,748.40
  4. Step 4: Simplify right side
    66,209.20x = 6,529,723,447.92
  5. Step 5: Solve for x
    x = 6,529,723,447.92/66,209.20
  6. Step 6: Final answer
    x = 98,622.60

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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.