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Finding the Fourth Proportional to 86,085.54, 129,130.62 and 26,921.21

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Solution

The fourth proportional to 86,085.54, 129,130.62 and 26,921.21 is: 40,382.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,085.54 : 129,130.62 = 26,921.21 : x
  2. Step 2: Convert to fraction form
    86,085.54/129,130.62 = 26,921.21/x
  3. Step 3: Cross multiply
    86,085.54x = 129,130.62 × 26,921.21
  4. Step 4: Simplify right side
    86,085.54x = 3,476,352,276.08
  5. Step 5: Solve for x
    x = 3,476,352,276.08/86,085.54
  6. Step 6: Final answer
    x = 40,382.53

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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.