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Finding the Fourth Proportional to 140,615.70, 210,923.55 and 47,121.45

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Solution

The fourth proportional to 140,615.70, 210,923.55 and 47,121.45 is: 70,682.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,615.70 : 210,923.55 = 47,121.45 : x
  2. Step 2: Convert to fraction form
    140,615.70/210,923.55 = 47,121.45/x
  3. Step 3: Cross multiply
    140,615.70x = 210,923.55 × 47,121.45
  4. Step 4: Simplify right side
    140,615.70x = 9,939,023,515.15
  5. Step 5: Solve for x
    x = 9,939,023,515.15/140,615.70
  6. Step 6: Final answer
    x = 70,682.18

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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.