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Finding the Fourth Proportional to 178,679.72, 268,019.38 and 139,266.34

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Solution

The fourth proportional to 178,679.72, 268,019.38 and 139,266.34 is: 208,899.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,679.72 : 268,019.38 = 139,266.34 : x
  2. Step 2: Convert to fraction form
    178,679.72/268,019.38 = 139,266.34/x
  3. Step 3: Cross multiply
    178,679.72x = 268,019.38 × 139,266.34
  4. Step 4: Simplify right side
    178,679.72x = 37,326,076,065.24
  5. Step 5: Solve for x
    x = 37,326,076,065.24/178,679.72
  6. Step 6: Final answer
    x = 208,899.34

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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.