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Finding the Fourth Proportional to 99,715.80, 149,573.70 and 66,327.60

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Solution

The fourth proportional to 99,715.80, 149,573.70 and 66,327.60 is: 99,491.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,715.80 : 149,573.70 = 66,327.60 : x
  2. Step 2: Convert to fraction form
    99,715.80/149,573.70 = 66,327.60/x
  3. Step 3: Cross multiply
    99,715.80x = 149,573.70 × 66,327.60
  4. Step 4: Simplify right side
    99,715.80x = 9,920,864,544.12
  5. Step 5: Solve for x
    x = 9,920,864,544.12/99,715.80
  6. Step 6: Final answer
    x = 99,491.40

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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.