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Finding the Fourth Proportional to 153,915, 212,266.62 and 100,150.44

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Solution

The fourth proportional to 153,915, 212,266.62 and 100,150.44 is: 138,119.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,915 : 212,266.62 = 100,150.44 : x
  2. Step 2: Convert to fraction form
    153,915/212,266.62 = 100,150.44/x
  3. Step 3: Cross multiply
    153,915x = 212,266.62 × 100,150.44
  4. Step 4: Simplify right side
    153,915x = 21,258,595,390.31
  5. Step 5: Solve for x
    x = 21,258,595,390.31/153,915
  6. Step 6: Final answer
    x = 138,119.06

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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.