Home / 136,969.18-189,036.24-78,824.74

Finding the Fourth Proportional to 136,969.18, 189,036.24 and 78,824.74

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Solution

The fourth proportional to 136,969.18, 189,036.24 and 78,824.74 is: 108,788.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,969.18 : 189,036.24 = 78,824.74 : x
  2. Step 2: Convert to fraction form
    136,969.18/189,036.24 = 78,824.74/x
  3. Step 3: Cross multiply
    136,969.18x = 189,036.24 × 78,824.74
  4. Step 4: Simplify right side
    136,969.18x = 14,900,732,468.58
  5. Step 5: Solve for x
    x = 14,900,732,468.58/136,969.18
  6. Step 6: Final answer
    x = 108,788.94

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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.