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Finding the Fourth Proportional to 111,877.96, 154,382.99 and 71,039.08

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Solution

The fourth proportional to 111,877.96, 154,382.99 and 71,039.08 is: 98,028.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,877.96 : 154,382.99 = 71,039.08 : x
  2. Step 2: Convert to fraction form
    111,877.96/154,382.99 = 71,039.08/x
  3. Step 3: Cross multiply
    111,877.96x = 154,382.99 × 71,039.08
  4. Step 4: Simplify right side
    111,877.96x = 10,967,224,746.43
  5. Step 5: Solve for x
    x = 10,967,224,746.43/111,877.96
  6. Step 6: Final answer
    x = 98,028.47

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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.