Home / 72,479.36-99,979.04-45,579.20

Finding the Fourth Proportional to 72,479.36, 99,979.04 and 45,579.20

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Solution

The fourth proportional to 72,479.36, 99,979.04 and 45,579.20 is: 62,872.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,479.36 : 99,979.04 = 45,579.20 : x
  2. Step 2: Convert to fraction form
    72,479.36/99,979.04 = 45,579.20/x
  3. Step 3: Cross multiply
    72,479.36x = 99,979.04 × 45,579.20
  4. Step 4: Simplify right side
    72,479.36x = 4,556,964,659.97
  5. Step 5: Solve for x
    x = 4,556,964,659.97/72,479.36
  6. Step 6: Final answer
    x = 62,872.58

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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.