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Finding the Fourth Proportional to 70,879.20, 106,318.92 and 66,548.92

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Solution

The fourth proportional to 70,879.20, 106,318.92 and 66,548.92 is: 99,823.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,879.20 : 106,318.92 = 66,548.92 : x
  2. Step 2: Convert to fraction form
    70,879.20/106,318.92 = 66,548.92/x
  3. Step 3: Cross multiply
    70,879.20x = 106,318.92 × 66,548.92
  4. Step 4: Simplify right side
    70,879.20x = 7,075,409,301.57
  5. Step 5: Solve for x
    x = 7,075,409,301.57/70,879.20
  6. Step 6: Final answer
    x = 99,823.49

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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.