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Finding the Fourth Proportional to 121,368.44, 167,488.80 and 70,391

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Solution

The fourth proportional to 121,368.44, 167,488.80 and 70,391 is: 97,139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,368.44 : 167,488.80 = 70,391 : x
  2. Step 2: Convert to fraction form
    121,368.44/167,488.80 = 70,391/x
  3. Step 3: Cross multiply
    121,368.44x = 167,488.80 × 70,391
  4. Step 4: Simplify right side
    121,368.44x = 11,789,704,120.80
  5. Step 5: Solve for x
    x = 11,789,704,120.80/121,368.44
  6. Step 6: Final answer
    x = 97,139.78

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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.