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Finding the Fourth Proportional to 112,906.38, 155,812.96 and 61,916.08

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Solution

The fourth proportional to 112,906.38, 155,812.96 and 61,916.08 is: 85,445.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,906.38 : 155,812.96 = 61,916.08 : x
  2. Step 2: Convert to fraction form
    112,906.38/155,812.96 = 61,916.08/x
  3. Step 3: Cross multiply
    112,906.38x = 155,812.96 × 61,916.08
  4. Step 4: Simplify right side
    112,906.38x = 9,647,327,696.40
  5. Step 5: Solve for x
    x = 9,647,327,696.40/112,906.38
  6. Step 6: Final answer
    x = 85,445.37

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1.5x scale

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.