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Finding the Fourth Proportional to 121,520.67, 167,671.65 and 70,503.84

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Solution

The fourth proportional to 121,520.67, 167,671.65 and 70,503.84 is: 97,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,520.67 : 167,671.65 = 70,503.84 : x
  2. Step 2: Convert to fraction form
    121,520.67/167,671.65 = 70,503.84/x
  3. Step 3: Cross multiply
    121,520.67x = 167,671.65 × 70,503.84
  4. Step 4: Simplify right side
    121,520.67x = 11,821,495,184.14
  5. Step 5: Solve for x
    x = 11,821,495,184.14/121,520.67
  6. Step 6: Final answer
    x = 97,279.71

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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.