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Finding the Fourth Proportional to 228,398.56, 342,630.65 and 70,639.31

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Solution

The fourth proportional to 228,398.56, 342,630.65 and 70,639.31 is: 105,969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,398.56 : 342,630.65 = 70,639.31 : x
  2. Step 2: Convert to fraction form
    228,398.56/342,630.65 = 70,639.31/x
  3. Step 3: Cross multiply
    228,398.56x = 342,630.65 × 70,639.31
  4. Step 4: Simplify right side
    228,398.56x = 24,203,193,734.03
  5. Step 5: Solve for x
    x = 24,203,193,734.03/228,398.56
  6. Step 6: Final answer
    x = 105,969.12

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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.