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Finding the Fourth Proportional to 128,080.71, 191,989.80 and 53,244.27

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Solution

The fourth proportional to 128,080.71, 191,989.80 and 53,244.27 is: 79,811.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,080.71 : 191,989.80 = 53,244.27 : x
  2. Step 2: Convert to fraction form
    128,080.71/191,989.80 = 53,244.27/x
  3. Step 3: Cross multiply
    128,080.71x = 191,989.80 × 53,244.27
  4. Step 4: Simplify right side
    128,080.71x = 10,222,356,748.45
  5. Step 5: Solve for x
    x = 10,222,356,748.45/128,080.71
  6. Step 6: Final answer
    x = 79,811.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.