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Finding the Fourth Proportional to 163,508.64, 245,211.12 and 69,989.28

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Solution

The fourth proportional to 163,508.64, 245,211.12 and 69,989.28 is: 104,961.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,508.64 : 245,211.12 = 69,989.28 : x
  2. Step 2: Convert to fraction form
    163,508.64/245,211.12 = 69,989.28/x
  3. Step 3: Cross multiply
    163,508.64x = 245,211.12 × 69,989.28
  4. Step 4: Simplify right side
    163,508.64x = 17,162,149,736.79
  5. Step 5: Solve for x
    x = 17,162,149,736.79/163,508.64
  6. Step 6: Final answer
    x = 104,961.73

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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.