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Finding the Fourth Proportional to 121,064.45, 167,068.13 and 66,619.92

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Solution

The fourth proportional to 121,064.45, 167,068.13 and 66,619.92 is: 91,935.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,064.45 : 167,068.13 = 66,619.92 : x
  2. Step 2: Convert to fraction form
    121,064.45/167,068.13 = 66,619.92/x
  3. Step 3: Cross multiply
    121,064.45x = 167,068.13 × 66,619.92
  4. Step 4: Simplify right side
    121,064.45x = 11,130,065,122.05
  5. Step 5: Solve for x
    x = 11,130,065,122.05/121,064.45
  6. Step 6: Final answer
    x = 91,935.04

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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.