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Finding the Fourth Proportional to 238,987.20, 358,480.78 and 72,775.20

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Solution

The fourth proportional to 238,987.20, 358,480.78 and 72,775.20 is: 109,162.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,987.20 : 358,480.78 = 72,775.20 : x
  2. Step 2: Convert to fraction form
    238,987.20/358,480.78 = 72,775.20/x
  3. Step 3: Cross multiply
    238,987.20x = 358,480.78 × 72,775.20
  4. Step 4: Simplify right side
    238,987.20x = 26,088,510,460.66
  5. Step 5: Solve for x
    x = 26,088,510,460.66/238,987.20
  6. Step 6: Final answer
    x = 109,162.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.