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Finding the Fourth Proportional to 192,794.40, 265,695.66 and 138,987.72

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Solution

The fourth proportional to 192,794.40, 265,695.66 and 138,987.72 is: 191,543.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,794.40 : 265,695.66 = 138,987.72 : x
  2. Step 2: Convert to fraction form
    192,794.40/265,695.66 = 138,987.72/x
  3. Step 3: Cross multiply
    192,794.40x = 265,695.66 × 138,987.72
  4. Step 4: Simplify right side
    192,794.40x = 36,928,433,997.30
  5. Step 5: Solve for x
    x = 36,928,433,997.30/192,794.40
  6. Step 6: Final answer
    x = 191,543.08

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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.