Home / 85,470.15-128,205.31-22,290.21

Finding the Fourth Proportional to 85,470.15, 128,205.31 and 22,290.21

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Solution

The fourth proportional to 85,470.15, 128,205.31 and 22,290.21 is: 33,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,470.15 : 128,205.31 = 22,290.21 : x
  2. Step 2: Convert to fraction form
    85,470.15/128,205.31 = 22,290.21/x
  3. Step 3: Cross multiply
    85,470.15x = 128,205.31 × 22,290.21
  4. Step 4: Simplify right side
    85,470.15x = 2,857,723,283.02
  5. Step 5: Solve for x
    x = 2,857,723,283.02/85,470.15
  6. Step 6: Final answer
    x = 33,435.34

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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.