Home / 85,514.36-128,275.86-26,390.48

Finding the Fourth Proportional to 85,514.36, 128,275.86 and 26,390.48

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Solution

The fourth proportional to 85,514.36, 128,275.86 and 26,390.48 is: 39,587.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,514.36 : 128,275.86 = 26,390.48 : x
  2. Step 2: Convert to fraction form
    85,514.36/128,275.86 = 26,390.48/x
  3. Step 3: Cross multiply
    85,514.36x = 128,275.86 × 26,390.48
  4. Step 4: Simplify right side
    85,514.36x = 3,385,261,517.81
  5. Step 5: Solve for x
    x = 3,385,261,517.81/85,514.36
  6. Step 6: Final answer
    x = 39,587.05

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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.