Home / 215,695.10-297,681.49-129,682.21

Finding the Fourth Proportional to 215,695.10, 297,681.49 and 129,682.21

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Solution

The fourth proportional to 215,695.10, 297,681.49 and 129,682.21 is: 178,974.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,695.10 : 297,681.49 = 129,682.21 : x
  2. Step 2: Convert to fraction form
    215,695.10/297,681.49 = 129,682.21/x
  3. Step 3: Cross multiply
    215,695.10x = 297,681.49 × 129,682.21
  4. Step 4: Simplify right side
    215,695.10x = 38,603,993,499.29
  5. Step 5: Solve for x
    x = 38,603,993,499.29/215,695.10
  6. Step 6: Final answer
    x = 178,974.83

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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.