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Finding the Fourth Proportional to 220,081.05, 303,784.02 and 129,432.74

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Solution

The fourth proportional to 220,081.05, 303,784.02 and 129,432.74 is: 178,659.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,081.05 : 303,784.02 = 129,432.74 : x
  2. Step 2: Convert to fraction form
    220,081.05/303,784.02 = 129,432.74/x
  3. Step 3: Cross multiply
    220,081.05x = 303,784.02 × 129,432.74
  4. Step 4: Simplify right side
    220,081.05x = 39,319,596,557.89
  5. Step 5: Solve for x
    x = 39,319,596,557.89/220,081.05
  6. Step 6: Final answer
    x = 178,659.62

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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.