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Finding the Fourth Proportional to 274,916.77, 412,439.72 and 85,367.35

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Solution

The fourth proportional to 274,916.77, 412,439.72 and 85,367.35 is: 128,071.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,916.77 : 412,439.72 = 85,367.35 : x
  2. Step 2: Convert to fraction form
    274,916.77/412,439.72 = 85,367.35/x
  3. Step 3: Cross multiply
    274,916.77x = 412,439.72 × 85,367.35
  4. Step 4: Simplify right side
    274,916.77x = 35,208,886,019.85
  5. Step 5: Solve for x
    x = 35,208,886,019.85/274,916.77
  6. Step 6: Final answer
    x = 128,071.08

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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.