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Finding the Fourth Proportional to 140,368.51, 193,728.30 and 89,364.95

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Solution

The fourth proportional to 140,368.51, 193,728.30 and 89,364.95 is: 123,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,368.51 : 193,728.30 = 89,364.95 : x
  2. Step 2: Convert to fraction form
    140,368.51/193,728.30 = 89,364.95/x
  3. Step 3: Cross multiply
    140,368.51x = 193,728.30 × 89,364.95
  4. Step 4: Simplify right side
    140,368.51x = 17,312,519,843.09
  5. Step 5: Solve for x
    x = 17,312,519,843.09/140,368.51
  6. Step 6: Final answer
    x = 123,336.21

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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.