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Finding the Fourth Proportional to 140,480.45, 210,720.86 and 57,374.45

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Solution

The fourth proportional to 140,480.45, 210,720.86 and 57,374.45 is: 86,061.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,480.45 : 210,720.86 = 57,374.45 : x
  2. Step 2: Convert to fraction form
    140,480.45/210,720.86 = 57,374.45/x
  3. Step 3: Cross multiply
    140,480.45x = 210,720.86 × 57,374.45
  4. Step 4: Simplify right side
    140,480.45x = 12,089,992,105.55
  5. Step 5: Solve for x
    x = 12,089,992,105.55/140,480.45
  6. Step 6: Final answer
    x = 86,061.74

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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.