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Finding the Fourth Proportional to 121,585.77, 167,785.56 and 67,875.75

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Solution

The fourth proportional to 121,585.77, 167,785.56 and 67,875.75 is: 93,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,585.77 : 167,785.56 = 67,875.75 : x
  2. Step 2: Convert to fraction form
    121,585.77/167,785.56 = 67,875.75/x
  3. Step 3: Cross multiply
    121,585.77x = 167,785.56 × 67,875.75
  4. Step 4: Simplify right side
    121,585.77x = 11,388,570,724.17
  5. Step 5: Solve for x
    x = 11,388,570,724.17/121,585.77
  6. Step 6: Final answer
    x = 93,666.97

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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.