Home / 221,103.22-305,123.45-125,615.15

Finding the Fourth Proportional to 221,103.22, 305,123.45 and 125,615.15

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Solution

The fourth proportional to 221,103.22, 305,123.45 and 125,615.15 is: 173,349.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,103.22 : 305,123.45 = 125,615.15 : x
  2. Step 2: Convert to fraction form
    221,103.22/305,123.45 = 125,615.15/x
  3. Step 3: Cross multiply
    221,103.22x = 305,123.45 × 125,615.15
  4. Step 4: Simplify right side
    221,103.22x = 38,328,127,312.19
  5. Step 5: Solve for x
    x = 38,328,127,312.19/221,103.22
  6. Step 6: Final answer
    x = 173,349.48

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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.