Home / 81,661.12-121,995.56-51,840.16

Finding the Fourth Proportional to 81,661.12, 121,995.56 and 51,840.16

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Solution

The fourth proportional to 81,661.12, 121,995.56 and 51,840.16 is: 77,445.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,661.12 : 121,995.56 = 51,840.16 : x
  2. Step 2: Convert to fraction form
    81,661.12/121,995.56 = 51,840.16/x
  3. Step 3: Cross multiply
    81,661.12x = 121,995.56 × 51,840.16
  4. Step 4: Simplify right side
    81,661.12x = 6,324,269,349.69
  5. Step 5: Solve for x
    x = 6,324,269,349.69/81,661.12
  6. Step 6: Final answer
    x = 77,445.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.