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Finding the Fourth Proportional to 121,703.36, 167,938.56 and 67,987.22

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Solution

The fourth proportional to 121,703.36, 167,938.56 and 67,987.22 is: 93,815.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,703.36 : 167,938.56 = 67,987.22 : x
  2. Step 2: Convert to fraction form
    121,703.36/167,938.56 = 67,987.22/x
  3. Step 3: Cross multiply
    121,703.36x = 167,938.56 × 67,987.22
  4. Step 4: Simplify right side
    121,703.36x = 11,417,675,825.20
  5. Step 5: Solve for x
    x = 11,417,675,825.20/121,703.36
  6. Step 6: Final answer
    x = 93,815.62

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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.