Home / 136,979.82-189,031.59-76,550.45

Finding the Fourth Proportional to 136,979.82, 189,031.59 and 76,550.45

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Solution

The fourth proportional to 136,979.82, 189,031.59 and 76,550.45 is: 105,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,979.82 : 189,031.59 = 76,550.45 : x
  2. Step 2: Convert to fraction form
    136,979.82/189,031.59 = 76,550.45/x
  3. Step 3: Cross multiply
    136,979.82x = 189,031.59 × 76,550.45
  4. Step 4: Simplify right side
    136,979.82x = 14,470,452,333.56
  5. Step 5: Solve for x
    x = 14,470,452,333.56/136,979.82
  6. Step 6: Final answer
    x = 105,639.30

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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.