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Finding the Fourth Proportional to 238,978.90, 329,752.30 and 136,985.60

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Solution

The fourth proportional to 238,978.90, 329,752.30 and 136,985.60 is: 189,018.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,978.90 : 329,752.30 = 136,985.60 : x
  2. Step 2: Convert to fraction form
    238,978.90/329,752.30 = 136,985.60/x
  3. Step 3: Cross multiply
    238,978.90x = 329,752.30 × 136,985.60
  4. Step 4: Simplify right side
    238,978.90x = 45,171,316,666.88
  5. Step 5: Solve for x
    x = 45,171,316,666.88/238,978.90
  6. Step 6: Final answer
    x = 189,018.01

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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.