Home / 130,179.05-179,637.75-72,815.36

Finding the Fourth Proportional to 130,179.05, 179,637.75 and 72,815.36

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Solution

The fourth proportional to 130,179.05, 179,637.75 and 72,815.36 is: 100,479.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,179.05 : 179,637.75 = 72,815.36 : x
  2. Step 2: Convert to fraction form
    130,179.05/179,637.75 = 72,815.36/x
  3. Step 3: Cross multiply
    130,179.05x = 179,637.75 × 72,815.36
  4. Step 4: Simplify right side
    130,179.05x = 13,080,386,537.65
  5. Step 5: Solve for x
    x = 13,080,386,537.65/130,179.05
  6. Step 6: Final answer
    x = 100,479.97

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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.