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Finding the Fourth Proportional to 72,649.40, 100,256.26 and 40,818.28

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Solution

The fourth proportional to 72,649.40, 100,256.26 and 40,818.28 is: 56,329.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,649.40 : 100,256.26 = 40,818.28 : x
  2. Step 2: Convert to fraction form
    72,649.40/100,256.26 = 40,818.28/x
  3. Step 3: Cross multiply
    72,649.40x = 100,256.26 × 40,818.28
  4. Step 4: Simplify right side
    72,649.40x = 4,092,288,092.43
  5. Step 5: Solve for x
    x = 4,092,288,092.43/72,649.40
  6. Step 6: Final answer
    x = 56,329.28

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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.