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Finding the Fourth Proportional to 72,612.83, 100,200.77 and 40,781.05

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Solution

The fourth proportional to 72,612.83, 100,200.77 and 40,781.05 is: 56,275.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.83 : 100,200.77 = 40,781.05 : x
  2. Step 2: Convert to fraction form
    72,612.83/100,200.77 = 40,781.05/x
  3. Step 3: Cross multiply
    72,612.83x = 100,200.77 × 40,781.05
  4. Step 4: Simplify right side
    72,612.83x = 4,086,292,611.41
  5. Step 5: Solve for x
    x = 4,086,292,611.41/72,612.83
  6. Step 6: Final answer
    x = 56,275.08

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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.