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Finding the Fourth Proportional to 159,878.56, 239,973.36 and 76,830.88

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Solution

The fourth proportional to 159,878.56, 239,973.36 and 76,830.88 is: 115,321.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,878.56 : 239,973.36 = 76,830.88 : x
  2. Step 2: Convert to fraction form
    159,878.56/239,973.36 = 76,830.88/x
  3. Step 3: Cross multiply
    159,878.56x = 239,973.36 × 76,830.88
  4. Step 4: Simplify right side
    159,878.56x = 18,437,364,425.36
  5. Step 5: Solve for x
    x = 18,437,364,425.36/159,878.56
  6. Step 6: Final answer
    x = 115,321.06

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1.5x scale

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.