Home / 259,314.28-388,971.48-81,835.12

Finding the Fourth Proportional to 259,314.28, 388,971.48 and 81,835.12

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Solution

The fourth proportional to 259,314.28, 388,971.48 and 81,835.12 is: 122,752.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,314.28 : 388,971.48 = 81,835.12 : x
  2. Step 2: Convert to fraction form
    259,314.28/388,971.48 = 81,835.12/x
  3. Step 3: Cross multiply
    259,314.28x = 388,971.48 × 81,835.12
  4. Step 4: Simplify right side
    259,314.28x = 31,831,527,742.38
  5. Step 5: Solve for x
    x = 31,831,527,742.38/259,314.28
  6. Step 6: Final answer
    x = 122,752.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.