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Finding the Fourth Proportional to 143,748, 215,336.78 and 67,742.46

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Solution

The fourth proportional to 143,748, 215,336.78 and 67,742.46 is: 101,479.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,748 : 215,336.78 = 67,742.46 : x
  2. Step 2: Convert to fraction form
    143,748/215,336.78 = 67,742.46/x
  3. Step 3: Cross multiply
    143,748x = 215,336.78 × 67,742.46
  4. Step 4: Simplify right side
    143,748x = 14,587,443,205.68
  5. Step 5: Solve for x
    x = 14,587,443,205.68/143,748
  6. Step 6: Final answer
    x = 101,479.28

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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.