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Finding the Fourth Proportional to 86,697.50, 130,046.25 and 21,033.50

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Solution

The fourth proportional to 86,697.50, 130,046.25 and 21,033.50 is: 31,550.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,697.50 : 130,046.25 = 21,033.50 : x
  2. Step 2: Convert to fraction form
    86,697.50/130,046.25 = 21,033.50/x
  3. Step 3: Cross multiply
    86,697.50x = 130,046.25 × 21,033.50
  4. Step 4: Simplify right side
    86,697.50x = 2,735,327,799.38
  5. Step 5: Solve for x
    x = 2,735,327,799.38/86,697.50
  6. Step 6: Final answer
    x = 31,550.25

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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.