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Finding the Fourth Proportional to 221,878.55, 306,340.05 and 131,263.55

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Solution

The fourth proportional to 221,878.55, 306,340.05 and 131,263.55 is: 181,231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,878.55 : 306,340.05 = 131,263.55 : x
  2. Step 2: Convert to fraction form
    221,878.55/306,340.05 = 131,263.55/x
  3. Step 3: Cross multiply
    221,878.55x = 306,340.05 × 131,263.55
  4. Step 4: Simplify right side
    221,878.55x = 40,211,280,938.48
  5. Step 5: Solve for x
    x = 40,211,280,938.48/221,878.55
  6. Step 6: Final answer
    x = 181,231.04

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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.