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Finding the Fourth Proportional to 215,419.61, 297,179.30 and 138,963.38

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Solution

The fourth proportional to 215,419.61, 297,179.30 and 138,963.38 is: 191,705.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,419.61 : 297,179.30 = 138,963.38 : x
  2. Step 2: Convert to fraction form
    215,419.61/297,179.30 = 138,963.38/x
  3. Step 3: Cross multiply
    215,419.61x = 297,179.30 × 138,963.38
  4. Step 4: Simplify right side
    215,419.61x = 41,297,038,855.55
  5. Step 5: Solve for x
    x = 41,297,038,855.55/215,419.61
  6. Step 6: Final answer
    x = 191,705.10

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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.