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Finding the Fourth Proportional to 143,824.80, 215,575.20 and 68,980.80

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Solution

The fourth proportional to 143,824.80, 215,575.20 and 68,980.80 is: 103,393.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,824.80 : 215,575.20 = 68,980.80 : x
  2. Step 2: Convert to fraction form
    143,824.80/215,575.20 = 68,980.80/x
  3. Step 3: Cross multiply
    143,824.80x = 215,575.20 × 68,980.80
  4. Step 4: Simplify right side
    143,824.80x = 14,870,549,756.16
  5. Step 5: Solve for x
    x = 14,870,549,756.16/143,824.80
  6. Step 6: Final answer
    x = 103,393.50

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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.