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Finding the Fourth Proportional to 68,398.07, 94,390.93 and 42,905.51

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Solution

The fourth proportional to 68,398.07, 94,390.93 and 42,905.51 is: 59,210.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,398.07 : 94,390.93 = 42,905.51 : x
  2. Step 2: Convert to fraction form
    68,398.07/94,390.93 = 42,905.51/x
  3. Step 3: Cross multiply
    68,398.07x = 94,390.93 × 42,905.51
  4. Step 4: Simplify right side
    68,398.07x = 4,049,891,517.95
  5. Step 5: Solve for x
    x = 4,049,891,517.95/68,398.07
  6. Step 6: Final answer
    x = 59,210.61

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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.