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Finding the Fourth Proportional to 113,916.64, 157,206 and 66,172

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Solution

The fourth proportional to 113,916.64, 157,206 and 66,172 is: 91,317.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,916.64 : 157,206 = 66,172 : x
  2. Step 2: Convert to fraction form
    113,916.64/157,206 = 66,172/x
  3. Step 3: Cross multiply
    113,916.64x = 157,206 × 66,172
  4. Step 4: Simplify right side
    113,916.64x = 10,402,635,432
  5. Step 5: Solve for x
    x = 10,402,635,432/113,916.64
  6. Step 6: Final answer
    x = 91,317.96

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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.