Home / 81,015.13-121,522.70-25,611.13

Finding the Fourth Proportional to 81,015.13, 121,522.70 and 25,611.13

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Solution

The fourth proportional to 81,015.13, 121,522.70 and 25,611.13 is: 38,416.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.13 : 121,522.70 = 25,611.13 : x
  2. Step 2: Convert to fraction form
    81,015.13/121,522.70 = 25,611.13/x
  3. Step 3: Cross multiply
    81,015.13x = 121,522.70 × 25,611.13
  4. Step 4: Simplify right side
    81,015.13x = 3,112,333,667.65
  5. Step 5: Solve for x
    x = 3,112,333,667.65/81,015.13
  6. Step 6: Final answer
    x = 38,416.70

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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.