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Finding the Fourth Proportional to 127,190.62, 190,813.61 and 42,947.21

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Solution

The fourth proportional to 127,190.62, 190,813.61 and 42,947.21 is: 64,430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,190.62 : 190,813.61 = 42,947.21 : x
  2. Step 2: Convert to fraction form
    127,190.62/190,813.61 = 42,947.21/x
  3. Step 3: Cross multiply
    127,190.62x = 190,813.61 × 42,947.21
  4. Step 4: Simplify right side
    127,190.62x = 8,194,912,839.42
  5. Step 5: Solve for x
    x = 8,194,912,839.42/127,190.62
  6. Step 6: Final answer
    x = 64,430.16

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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.