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Finding the Fourth Proportional to 157,077.80, 235,616.70 and 140,019.20

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Solution

The fourth proportional to 157,077.80, 235,616.70 and 140,019.20 is: 210,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,077.80 : 235,616.70 = 140,019.20 : x
  2. Step 2: Convert to fraction form
    157,077.80/235,616.70 = 140,019.20/x
  3. Step 3: Cross multiply
    157,077.80x = 235,616.70 × 140,019.20
  4. Step 4: Simplify right side
    157,077.80x = 32,990,861,840.64
  5. Step 5: Solve for x
    x = 32,990,861,840.64/157,077.80
  6. Step 6: Final answer
    x = 210,028.80

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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.