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Finding the Fourth Proportional to 223,704.05, 308,724.87 and 128,216.91

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Solution

The fourth proportional to 223,704.05, 308,724.87 and 128,216.91 is: 176,946.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,704.05 : 308,724.87 = 128,216.91 : x
  2. Step 2: Convert to fraction form
    223,704.05/308,724.87 = 128,216.91/x
  3. Step 3: Cross multiply
    223,704.05x = 308,724.87 × 128,216.91
  4. Step 4: Simplify right side
    223,704.05x = 39,583,748,871.55
  5. Step 5: Solve for x
    x = 39,583,748,871.55/223,704.05
  6. Step 6: Final answer
    x = 176,946.95

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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.