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Finding the Fourth Proportional to 121,209.45, 167,292.41 and 73,488.93

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Solution

The fourth proportional to 121,209.45, 167,292.41 and 73,488.93 is: 101,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,209.45 : 167,292.41 = 73,488.93 : x
  2. Step 2: Convert to fraction form
    121,209.45/167,292.41 = 73,488.93/x
  3. Step 3: Cross multiply
    121,209.45x = 167,292.41 × 73,488.93
  4. Step 4: Simplify right side
    121,209.45x = 12,294,139,840.58
  5. Step 5: Solve for x
    x = 12,294,139,840.58/121,209.45
  6. Step 6: Final answer
    x = 101,428.89

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1.5x scale

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.