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Finding the Fourth Proportional to 72,579.59, 100,156.42 and 40,316.29

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Solution

The fourth proportional to 72,579.59, 100,156.42 and 40,316.29 is: 55,634.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,579.59 : 100,156.42 = 40,316.29 : x
  2. Step 2: Convert to fraction form
    72,579.59/100,156.42 = 40,316.29/x
  3. Step 3: Cross multiply
    72,579.59x = 100,156.42 × 40,316.29
  4. Step 4: Simplify right side
    72,579.59x = 4,037,934,847.31
  5. Step 5: Solve for x
    x = 4,037,934,847.31/72,579.59
  6. Step 6: Final answer
    x = 55,634.58

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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.