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Finding the Fourth Proportional to 72,702.72, 100,324.68 and 40,876.32

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Solution

The fourth proportional to 72,702.72, 100,324.68 and 40,876.32 is: 56,406.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,702.72 : 100,324.68 = 40,876.32 : x
  2. Step 2: Convert to fraction form
    72,702.72/100,324.68 = 40,876.32/x
  3. Step 3: Cross multiply
    72,702.72x = 100,324.68 × 40,876.32
  4. Step 4: Simplify right side
    72,702.72x = 4,100,903,723.58
  5. Step 5: Solve for x
    x = 4,100,903,723.58/72,702.72
  6. Step 6: Final answer
    x = 56,406.47

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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.