Home / 330,428.64-495,643.68-81,111.36

Finding the Fourth Proportional to 330,428.64, 495,643.68 and 81,111.36

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Solution

The fourth proportional to 330,428.64, 495,643.68 and 81,111.36 is: 121,667.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,428.64 : 495,643.68 = 81,111.36 : x
  2. Step 2: Convert to fraction form
    330,428.64/495,643.68 = 81,111.36/x
  3. Step 3: Cross multiply
    330,428.64x = 495,643.68 × 81,111.36
  4. Step 4: Simplify right side
    330,428.64x = 40,202,332,960.20
  5. Step 5: Solve for x
    x = 40,202,332,960.20/330,428.64
  6. Step 6: Final answer
    x = 121,667.22

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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.