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Finding the Fourth Proportional to 137,886.60, 190,278.39 and 76,636.59

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Solution

The fourth proportional to 137,886.60, 190,278.39 and 76,636.59 is: 105,755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,886.60 : 190,278.39 = 76,636.59 : x
  2. Step 2: Convert to fraction form
    137,886.60/190,278.39 = 76,636.59/x
  3. Step 3: Cross multiply
    137,886.60x = 190,278.39 × 76,636.59
  4. Step 4: Simplify right side
    137,886.60x = 14,582,286,960.29
  5. Step 5: Solve for x
    x = 14,582,286,960.29/137,886.60
  6. Step 6: Final answer
    x = 105,755.65

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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.