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Finding the Fourth Proportional to 154,702.03, 213,488.55 and 86,719.05

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Solution

The fourth proportional to 154,702.03, 213,488.55 and 86,719.05 is: 119,672.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,702.03 : 213,488.55 = 86,719.05 : x
  2. Step 2: Convert to fraction form
    154,702.03/213,488.55 = 86,719.05/x
  3. Step 3: Cross multiply
    154,702.03x = 213,488.55 × 86,719.05
  4. Step 4: Simplify right side
    154,702.03x = 18,513,524,241.88
  5. Step 5: Solve for x
    x = 18,513,524,241.88/154,702.03
  6. Step 6: Final answer
    x = 119,672.15

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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.