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Finding the Fourth Proportional to 72,775.29, 100,429.68 and 40,944.18

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Solution

The fourth proportional to 72,775.29, 100,429.68 and 40,944.18 is: 56,502.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,775.29 : 100,429.68 = 40,944.18 : x
  2. Step 2: Convert to fraction form
    72,775.29/100,429.68 = 40,944.18/x
  3. Step 3: Cross multiply
    72,775.29x = 100,429.68 × 40,944.18
  4. Step 4: Simplify right side
    72,775.29x = 4,112,010,895.26
  5. Step 5: Solve for x
    x = 4,112,010,895.26/72,775.29
  6. Step 6: Final answer
    x = 56,502.84

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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.