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Finding the Fourth Proportional to 121,686.16, 167,910.30 and 67,964.32

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Solution

The fourth proportional to 121,686.16, 167,910.30 and 67,964.32 is: 93,781.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,686.16 : 167,910.30 = 67,964.32 : x
  2. Step 2: Convert to fraction form
    121,686.16/167,910.30 = 67,964.32/x
  3. Step 3: Cross multiply
    121,686.16x = 167,910.30 × 67,964.32
  4. Step 4: Simplify right side
    121,686.16x = 11,411,909,360.50
  5. Step 5: Solve for x
    x = 11,411,909,360.50/121,686.16
  6. Step 6: Final answer
    x = 93,781.49

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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.