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Finding the Fourth Proportional to 154,243.80, 212,867.28 and 86,267.10

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Solution

The fourth proportional to 154,243.80, 212,867.28 and 86,267.10 is: 119,054.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,243.80 : 212,867.28 = 86,267.10 : x
  2. Step 2: Convert to fraction form
    154,243.80/212,867.28 = 86,267.10/x
  3. Step 3: Cross multiply
    154,243.80x = 212,867.28 × 86,267.10
  4. Step 4: Simplify right side
    154,243.80x = 18,363,442,930.49
  5. Step 5: Solve for x
    x = 18,363,442,930.49/154,243.80
  6. Step 6: Final answer
    x = 119,054.66

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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.