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Finding the Fourth Proportional to 139,784.64, 191,817.84 and 127,112.64

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Solution

The fourth proportional to 139,784.64, 191,817.84 and 127,112.64 is: 174,428.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,784.64 : 191,817.84 = 127,112.64 : x
  2. Step 2: Convert to fraction form
    139,784.64/191,817.84 = 127,112.64/x
  3. Step 3: Cross multiply
    139,784.64x = 191,817.84 × 127,112.64
  4. Step 4: Simplify right side
    139,784.64x = 24,382,472,041.50
  5. Step 5: Solve for x
    x = 24,382,472,041.50/139,784.64
  6. Step 6: Final answer
    x = 174,428.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.