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Finding the Fourth Proportional to 239,153.12, 358,780.28 and 79,220

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Solution

The fourth proportional to 239,153.12, 358,780.28 and 79,220 is: 118,846.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,153.12 : 358,780.28 = 79,220 : x
  2. Step 2: Convert to fraction form
    239,153.12/358,780.28 = 79,220/x
  3. Step 3: Cross multiply
    239,153.12x = 358,780.28 × 79,220
  4. Step 4: Simplify right side
    239,153.12x = 28,422,573,781.60
  5. Step 5: Solve for x
    x = 28,422,573,781.60/239,153.12
  6. Step 6: Final answer
    x = 118,846.76

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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.