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Finding the Fourth Proportional to 159,944.90, 239,774.76 and 81,018.50

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Solution

The fourth proportional to 159,944.90, 239,774.76 and 81,018.50 is: 121,455.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,944.90 : 239,774.76 = 81,018.50 : x
  2. Step 2: Convert to fraction form
    159,944.90/239,774.76 = 81,018.50/x
  3. Step 3: Cross multiply
    159,944.90x = 239,774.76 × 81,018.50
  4. Step 4: Simplify right side
    159,944.90x = 19,426,191,393.06
  5. Step 5: Solve for x
    x = 19,426,191,393.06/159,944.90
  6. Step 6: Final answer
    x = 121,455.52

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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.