Home / 81,047.19-121,581.32-30,462.69

Finding the Fourth Proportional to 81,047.19, 121,581.32 and 30,462.69

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Solution

The fourth proportional to 81,047.19, 121,581.32 and 30,462.69 is: 45,697.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,047.19 : 121,581.32 = 30,462.69 : x
  2. Step 2: Convert to fraction form
    81,047.19/121,581.32 = 30,462.69/x
  3. Step 3: Cross multiply
    81,047.19x = 121,581.32 × 30,462.69
  4. Step 4: Simplify right side
    81,047.19x = 3,703,693,908.64
  5. Step 5: Solve for x
    x = 3,703,693,908.64/81,047.19
  6. Step 6: Final answer
    x = 45,697.99

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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.