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Finding the Fourth Proportional to 123,546.35, 170,478.72 and 87,723.29

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Solution

The fourth proportional to 123,546.35, 170,478.72 and 87,723.29 is: 121,047.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,546.35 : 170,478.72 = 87,723.29 : x
  2. Step 2: Convert to fraction form
    123,546.35/170,478.72 = 87,723.29/x
  3. Step 3: Cross multiply
    123,546.35x = 170,478.72 × 87,723.29
  4. Step 4: Simplify right side
    123,546.35x = 14,954,953,341.00
  5. Step 5: Solve for x
    x = 14,954,953,341.00/123,546.35
  6. Step 6: Final answer
    x = 121,047.32

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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.