Home / 221,384.10-305,513.46-120,782.10

Finding the Fourth Proportional to 221,384.10, 305,513.46 and 120,782.10

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Solution

The fourth proportional to 221,384.10, 305,513.46 and 120,782.10 is: 166,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,384.10 : 305,513.46 = 120,782.10 : x
  2. Step 2: Convert to fraction form
    221,384.10/305,513.46 = 120,782.10/x
  3. Step 3: Cross multiply
    221,384.10x = 305,513.46 × 120,782.10
  4. Step 4: Simplify right side
    221,384.10x = 36,900,557,277.07
  5. Step 5: Solve for x
    x = 36,900,557,277.07/221,384.10
  6. Step 6: Final answer
    x = 166,681.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.