Home / 221,719.64-305,973.11-121,117.64

Finding the Fourth Proportional to 221,719.64, 305,973.11 and 121,117.64

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Solution

The fourth proportional to 221,719.64, 305,973.11 and 121,117.64 is: 167,142.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,719.64 : 305,973.11 = 121,117.64 : x
  2. Step 2: Convert to fraction form
    221,719.64/305,973.11 = 121,117.64/x
  3. Step 3: Cross multiply
    221,719.64x = 305,973.11 × 121,117.64
  4. Step 4: Simplify right side
    221,719.64x = 37,058,739,759.59
  5. Step 5: Solve for x
    x = 37,058,739,759.59/221,719.64
  6. Step 6: Final answer
    x = 167,142.35

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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.