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Finding the Fourth Proportional to 72,735.90, 100,377.80 and 40,906.54

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Solution

The fourth proportional to 72,735.90, 100,377.80 and 40,906.54 is: 56,452.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,735.90 : 100,377.80 = 40,906.54 : x
  2. Step 2: Convert to fraction form
    72,735.90/100,377.80 = 40,906.54/x
  3. Step 3: Cross multiply
    72,735.90x = 100,377.80 × 40,906.54
  4. Step 4: Simplify right side
    72,735.90x = 4,106,108,490.81
  5. Step 5: Solve for x
    x = 4,106,108,490.81/72,735.90
  6. Step 6: Final answer
    x = 56,452.30

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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.