Home / 136,968.18-189,034.86-78,823.74

Finding the Fourth Proportional to 136,968.18, 189,034.86 and 78,823.74

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Solution

The fourth proportional to 136,968.18, 189,034.86 and 78,823.74 is: 108,787.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,968.18 : 189,034.86 = 78,823.74 : x
  2. Step 2: Convert to fraction form
    136,968.18/189,034.86 = 78,823.74/x
  3. Step 3: Cross multiply
    136,968.18x = 189,034.86 × 78,823.74
  4. Step 4: Simplify right side
    136,968.18x = 14,900,434,655.58
  5. Step 5: Solve for x
    x = 14,900,434,655.58/136,968.18
  6. Step 6: Final answer
    x = 108,787.56

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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.