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Finding the Fourth Proportional to 131,516.78, 181,492.80 and 74,928.56

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Solution

The fourth proportional to 131,516.78, 181,492.80 and 74,928.56 is: 103,401.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,516.78 : 181,492.80 = 74,928.56 : x
  2. Step 2: Convert to fraction form
    131,516.78/181,492.80 = 74,928.56/x
  3. Step 3: Cross multiply
    131,516.78x = 181,492.80 × 74,928.56
  4. Step 4: Simplify right side
    131,516.78x = 13,598,994,154.37
  5. Step 5: Solve for x
    x = 13,598,994,154.37/131,516.78
  6. Step 6: Final answer
    x = 103,401.21

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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.