Home / 90,815.45-136,223.28-43,419.39

Finding the Fourth Proportional to 90,815.45, 136,223.28 and 43,419.39

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Solution

The fourth proportional to 90,815.45, 136,223.28 and 43,419.39 is: 65,129.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.45 : 136,223.28 = 43,419.39 : x
  2. Step 2: Convert to fraction form
    90,815.45/136,223.28 = 43,419.39/x
  3. Step 3: Cross multiply
    90,815.45x = 136,223.28 × 43,419.39
  4. Step 4: Simplify right side
    90,815.45x = 5,914,731,721.40
  5. Step 5: Solve for x
    x = 5,914,731,721.40/90,815.45
  6. Step 6: Final answer
    x = 65,129.14

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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.