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Finding the Fourth Proportional to 221,661.60, 305,888.88 and 124,865.76

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Solution

The fourth proportional to 221,661.60, 305,888.88 and 124,865.76 is: 172,312.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,661.60 : 305,888.88 = 124,865.76 : x
  2. Step 2: Convert to fraction form
    221,661.60/305,888.88 = 124,865.76/x
  3. Step 3: Cross multiply
    221,661.60x = 305,888.88 × 124,865.76
  4. Step 4: Simplify right side
    221,661.60x = 38,195,047,476.75
  5. Step 5: Solve for x
    x = 38,195,047,476.75/221,661.60
  6. Step 6: Final answer
    x = 172,312.42

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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.