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Finding the Fourth Proportional to 218,043.90, 300,890.70 and 127,408.14

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Solution

The fourth proportional to 218,043.90, 300,890.70 and 127,408.14 is: 175,817.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,043.90 : 300,890.70 = 127,408.14 : x
  2. Step 2: Convert to fraction form
    218,043.90/300,890.70 = 127,408.14/x
  3. Step 3: Cross multiply
    218,043.90x = 300,890.70 × 127,408.14
  4. Step 4: Simplify right side
    218,043.90x = 38,335,924,430.30
  5. Step 5: Solve for x
    x = 38,335,924,430.30/218,043.90
  6. Step 6: Final answer
    x = 175,817.46

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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.