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Finding the Fourth Proportional to 70,879.68, 106,319.64 and 66,549.42

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Solution

The fourth proportional to 70,879.68, 106,319.64 and 66,549.42 is: 99,824.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,879.68 : 106,319.64 = 66,549.42 : x
  2. Step 2: Convert to fraction form
    70,879.68/106,319.64 = 66,549.42/x
  3. Step 3: Cross multiply
    70,879.68x = 106,319.64 × 66,549.42
  4. Step 4: Simplify right side
    70,879.68x = 7,075,510,376.61
  5. Step 5: Solve for x
    x = 7,075,510,376.61/70,879.68
  6. Step 6: Final answer
    x = 99,824.24

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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.