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Finding the Fourth Proportional to 121,587.68, 167,789.58 and 67,886

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Solution

The fourth proportional to 121,587.68, 167,789.58 and 67,886 is: 93,681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.68 : 167,789.58 = 67,886 : x
  2. Step 2: Convert to fraction form
    121,587.68/167,789.58 = 67,886/x
  3. Step 3: Cross multiply
    121,587.68x = 167,789.58 × 67,886
  4. Step 4: Simplify right side
    121,587.68x = 11,390,563,427.88
  5. Step 5: Solve for x
    x = 11,390,563,427.88/121,587.68
  6. Step 6: Final answer
    x = 93,681.89

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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.