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Finding the Fourth Proportional to 121,587.40, 167,790.27 and 67,871.98

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Solution

The fourth proportional to 121,587.40, 167,790.27 and 67,871.98 is: 93,663.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,587.40 : 167,790.27 = 67,871.98 : x
  2. Step 2: Convert to fraction form
    121,587.40/167,790.27 = 67,871.98/x
  3. Step 3: Cross multiply
    121,587.40x = 167,790.27 × 67,871.98
  4. Step 4: Simplify right side
    121,587.40x = 11,388,257,849.63
  5. Step 5: Solve for x
    x = 11,388,257,849.63/121,587.40
  6. Step 6: Final answer
    x = 93,663.14

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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.