Home / 215,901.64-323,874-66,140.20

Finding the Fourth Proportional to 215,901.64, 323,874 and 66,140.20

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Solution

The fourth proportional to 215,901.64, 323,874 and 66,140.20 is: 99,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,901.64 : 323,874 = 66,140.20 : x
  2. Step 2: Convert to fraction form
    215,901.64/323,874 = 66,140.20/x
  3. Step 3: Cross multiply
    215,901.64x = 323,874 × 66,140.20
  4. Step 4: Simplify right side
    215,901.64x = 21,421,091,134.80
  5. Step 5: Solve for x
    x = 21,421,091,134.80/215,901.64
  6. Step 6: Final answer
    x = 99,216.90

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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.