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Finding the Fourth Proportional to 86,805.80, 130,220.80 and 26,839.17

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Solution

The fourth proportional to 86,805.80, 130,220.80 and 26,839.17 is: 40,262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,805.80 : 130,220.80 = 26,839.17 : x
  2. Step 2: Convert to fraction form
    86,805.80/130,220.80 = 26,839.17/x
  3. Step 3: Cross multiply
    86,805.80x = 130,220.80 × 26,839.17
  4. Step 4: Simplify right side
    86,805.80x = 3,495,018,121.64
  5. Step 5: Solve for x
    x = 3,495,018,121.64/86,805.80
  6. Step 6: Final answer
    x = 40,262.50

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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.