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Finding the Fourth Proportional to 178.47, 245.84 and 139.59

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Solution

The fourth proportional to 178.47, 245.84 and 139.59 is: 192.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.47 : 245.84 = 139.59 : x
  2. Step 2: Convert to fraction form
    178.47/245.84 = 139.59/x
  3. Step 3: Cross multiply
    178.47x = 245.84 × 139.59
  4. Step 4: Simplify right side
    178.47x = 34,316.11
  5. Step 5: Solve for x
    x = 34,316.11/178.47
  6. Step 6: Final answer
    x = 192.28

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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.