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Finding the Fourth Proportional to 121,187.52, 167,251.72 and 70,928.64

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Solution

The fourth proportional to 121,187.52, 167,251.72 and 70,928.64 is: 97,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,187.52 : 167,251.72 = 70,928.64 : x
  2. Step 2: Convert to fraction form
    121,187.52/167,251.72 = 70,928.64/x
  3. Step 3: Cross multiply
    121,187.52x = 167,251.72 × 70,928.64
  4. Step 4: Simplify right side
    121,187.52x = 11,862,937,037.26
  5. Step 5: Solve for x
    x = 11,862,937,037.26/121,187.52
  6. Step 6: Final answer
    x = 97,889.10

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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.