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Finding the Fourth Proportional to 72,612.64, 100,206.74 and 40,350.24

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Solution

The fourth proportional to 72,612.64, 100,206.74 and 40,350.24 is: 55,684.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.64 : 100,206.74 = 40,350.24 : x
  2. Step 2: Convert to fraction form
    72,612.64/100,206.74 = 40,350.24/x
  3. Step 3: Cross multiply
    72,612.64x = 100,206.74 × 40,350.24
  4. Step 4: Simplify right side
    72,612.64x = 4,043,366,008.62
  5. Step 5: Solve for x
    x = 4,043,366,008.62/72,612.64
  6. Step 6: Final answer
    x = 55,684.05

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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.