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Finding the Fourth Proportional to 121,631.08, 167,890.98 and 71,329

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Solution

The fourth proportional to 121,631.08, 167,890.98 and 71,329 is: 98,457.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,631.08 : 167,890.98 = 71,329 : x
  2. Step 2: Convert to fraction form
    121,631.08/167,890.98 = 71,329/x
  3. Step 3: Cross multiply
    121,631.08x = 167,890.98 × 71,329
  4. Step 4: Simplify right side
    121,631.08x = 11,975,495,712.42
  5. Step 5: Solve for x
    x = 11,975,495,712.42/121,631.08
  6. Step 6: Final answer
    x = 98,457.53

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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.