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Finding the Fourth Proportional to 121,312.62, 167,406.12 and 67,603.50

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Solution

The fourth proportional to 121,312.62, 167,406.12 and 67,603.50 is: 93,289.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,312.62 : 167,406.12 = 67,603.50 : x
  2. Step 2: Convert to fraction form
    121,312.62/167,406.12 = 67,603.50/x
  3. Step 3: Cross multiply
    121,312.62x = 167,406.12 × 67,603.50
  4. Step 4: Simplify right side
    121,312.62x = 11,317,239,633.42
  5. Step 5: Solve for x
    x = 11,317,239,633.42/121,312.62
  6. Step 6: Final answer
    x = 93,289.88

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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.