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Finding the Fourth Proportional to 123,482.79, 170,406.32 and 66,894.17

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Solution

The fourth proportional to 123,482.79, 170,406.32 and 66,894.17 is: 92,313.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,482.79 : 170,406.32 = 66,894.17 : x
  2. Step 2: Convert to fraction form
    123,482.79/170,406.32 = 66,894.17/x
  3. Step 3: Cross multiply
    123,482.79x = 170,406.32 × 66,894.17
  4. Step 4: Simplify right side
    123,482.79x = 11,399,188,152.65
  5. Step 5: Solve for x
    x = 11,399,188,152.65/123,482.79
  6. Step 6: Final answer
    x = 92,313.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.