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Finding the Fourth Proportional to 159,011.21, 219,438.02 and 91,027.91

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Solution

The fourth proportional to 159,011.21, 219,438.02 and 91,027.91 is: 125,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,011.21 : 219,438.02 = 91,027.91 : x
  2. Step 2: Convert to fraction form
    159,011.21/219,438.02 = 91,027.91/x
  3. Step 3: Cross multiply
    159,011.21x = 219,438.02 × 91,027.91
  4. Step 4: Simplify right side
    159,011.21x = 19,974,984,335.14
  5. Step 5: Solve for x
    x = 19,974,984,335.14/159,011.21
  6. Step 6: Final answer
    x = 125,619.98

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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.