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Finding the Fourth Proportional to 140,212.40, 210,241.80 and 57,012.40

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Solution

The fourth proportional to 140,212.40, 210,241.80 and 57,012.40 is: 85,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,212.40 : 210,241.80 = 57,012.40 : x
  2. Step 2: Convert to fraction form
    140,212.40/210,241.80 = 57,012.40/x
  3. Step 3: Cross multiply
    140,212.40x = 210,241.80 × 57,012.40
  4. Step 4: Simplify right side
    140,212.40x = 11,986,389,598.32
  5. Step 5: Solve for x
    x = 11,986,389,598.32/140,212.40
  6. Step 6: Final answer
    x = 85,487.37

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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.