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Finding the Fourth Proportional to 66,409.61, 99,643.85 and 34,812.12

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Solution

The fourth proportional to 66,409.61, 99,643.85 and 34,812.12 is: 52,233.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,409.61 : 99,643.85 = 34,812.12 : x
  2. Step 2: Convert to fraction form
    66,409.61/99,643.85 = 34,812.12/x
  3. Step 3: Cross multiply
    66,409.61x = 99,643.85 × 34,812.12
  4. Step 4: Simplify right side
    66,409.61x = 3,468,813,993.61
  5. Step 5: Solve for x
    x = 3,468,813,993.61/66,409.61
  6. Step 6: Final answer
    x = 52,233.62

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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.