Home / 90,320.28-135,430.65-31,107.12

Finding the Fourth Proportional to 90,320.28, 135,430.65 and 31,107.12

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Solution

The fourth proportional to 90,320.28, 135,430.65 and 31,107.12 is: 46,643.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,320.28 : 135,430.65 = 31,107.12 : x
  2. Step 2: Convert to fraction form
    90,320.28/135,430.65 = 31,107.12/x
  3. Step 3: Cross multiply
    90,320.28x = 135,430.65 × 31,107.12
  4. Step 4: Simplify right side
    90,320.28x = 4,212,857,481.23
  5. Step 5: Solve for x
    x = 4,212,857,481.23/90,320.28
  6. Step 6: Final answer
    x = 46,643.54

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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.