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Finding the Fourth Proportional to 86,571.20, 121,549.60 and 86,571.20

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Solution

The fourth proportional to 86,571.20, 121,549.60 and 86,571.20 is: 121,549.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,571.20 : 121,549.60 = 86,571.20 : x
  2. Step 2: Convert to fraction form
    86,571.20/121,549.60 = 86,571.20/x
  3. Step 3: Cross multiply
    86,571.20x = 121,549.60 × 86,571.20
  4. Step 4: Simplify right side
    86,571.20x = 10,522,694,731.52
  5. Step 5: Solve for x
    x = 10,522,694,731.52/86,571.20
  6. Step 6: Final answer
    x = 121,549.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.