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Finding the Fourth Proportional to 117,246.78, 161,792.90 and 74,800.76

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Solution

The fourth proportional to 117,246.78, 161,792.90 and 74,800.76 is: 103,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,246.78 : 161,792.90 = 74,800.76 : x
  2. Step 2: Convert to fraction form
    117,246.78/161,792.90 = 74,800.76/x
  3. Step 3: Cross multiply
    117,246.78x = 161,792.90 × 74,800.76
  4. Step 4: Simplify right side
    117,246.78x = 12,102,231,882.60
  5. Step 5: Solve for x
    x = 12,102,231,882.60/117,246.78
  6. Step 6: Final answer
    x = 103,220.16

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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.