Home / 239,154.12-358,781.78-79,221

Finding the Fourth Proportional to 239,154.12, 358,781.78 and 79,221

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Solution

The fourth proportional to 239,154.12, 358,781.78 and 79,221 is: 118,848.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,154.12 : 358,781.78 = 79,221 : x
  2. Step 2: Convert to fraction form
    239,154.12/358,781.78 = 79,221/x
  3. Step 3: Cross multiply
    239,154.12x = 358,781.78 × 79,221
  4. Step 4: Simplify right side
    239,154.12x = 28,423,051,393.38
  5. Step 5: Solve for x
    x = 28,423,051,393.38/239,154.12
  6. Step 6: Final answer
    x = 118,848.26

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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.