Home / 211,521.38-317,298.47-71,280

Finding the Fourth Proportional to 211,521.38, 317,298.47 and 71,280

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Solution

The fourth proportional to 211,521.38, 317,298.47 and 71,280 is: 106,925.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,521.38 : 317,298.47 = 71,280 : x
  2. Step 2: Convert to fraction form
    211,521.38/317,298.47 = 71,280/x
  3. Step 3: Cross multiply
    211,521.38x = 317,298.47 × 71,280
  4. Step 4: Simplify right side
    211,521.38x = 22,617,034,585.20
  5. Step 5: Solve for x
    x = 22,617,034,585.20/211,521.38
  6. Step 6: Final answer
    x = 106,925.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.