Home / 72,181.54-99,612.75-40,351.78

Finding the Fourth Proportional to 72,181.54, 99,612.75 and 40,351.78

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Solution

The fourth proportional to 72,181.54, 99,612.75 and 40,351.78 is: 55,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,181.54 : 99,612.75 = 40,351.78 : x
  2. Step 2: Convert to fraction form
    72,181.54/99,612.75 = 40,351.78/x
  3. Step 3: Cross multiply
    72,181.54x = 99,612.75 × 40,351.78
  4. Step 4: Simplify right side
    72,181.54x = 4,019,551,773.20
  5. Step 5: Solve for x
    x = 4,019,551,773.20/72,181.54
  6. Step 6: Final answer
    x = 55,686.70

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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.