Home / 85,439.48-128,161.31-26,275.59

Finding the Fourth Proportional to 85,439.48, 128,161.31 and 26,275.59

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Solution

The fourth proportional to 85,439.48, 128,161.31 and 26,275.59 is: 39,414.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,439.48 : 128,161.31 = 26,275.59 : x
  2. Step 2: Convert to fraction form
    85,439.48/128,161.31 = 26,275.59/x
  3. Step 3: Cross multiply
    85,439.48x = 128,161.31 × 26,275.59
  4. Step 4: Simplify right side
    85,439.48x = 3,367,513,904.04
  5. Step 5: Solve for x
    x = 3,367,513,904.04/85,439.48
  6. Step 6: Final answer
    x = 39,414.03

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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.