Home / 137,115.78-189,219.24-76,686.18

Finding the Fourth Proportional to 137,115.78, 189,219.24 and 76,686.18

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Solution

The fourth proportional to 137,115.78, 189,219.24 and 76,686.18 is: 105,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,115.78 : 189,219.24 = 76,686.18 : x
  2. Step 2: Convert to fraction form
    137,115.78/189,219.24 = 76,686.18/x
  3. Step 3: Cross multiply
    137,115.78x = 189,219.24 × 76,686.18
  4. Step 4: Simplify right side
    137,115.78x = 14,510,500,698.10
  5. Step 5: Solve for x
    x = 14,510,500,698.10/137,115.78
  6. Step 6: Final answer
    x = 105,826.63

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1.5x scale

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.