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Finding the Fourth Proportional to 238,980.90, 329,755.05 and 136,987.59

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Solution

The fourth proportional to 238,980.90, 329,755.05 and 136,987.59 is: 189,020.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,980.90 : 329,755.05 = 136,987.59 : x
  2. Step 2: Convert to fraction form
    238,980.90/329,755.05 = 136,987.59/x
  3. Step 3: Cross multiply
    238,980.90x = 329,755.05 × 136,987.59
  4. Step 4: Simplify right side
    238,980.90x = 45,172,349,589.83
  5. Step 5: Solve for x
    x = 45,172,349,589.83/238,980.90
  6. Step 6: Final answer
    x = 189,020.75

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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.