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Finding the Fourth Proportional to 170,998.90, 256,498.35 and 103,639.30

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Solution

The fourth proportional to 170,998.90, 256,498.35 and 103,639.30 is: 155,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,998.90 : 256,498.35 = 103,639.30 : x
  2. Step 2: Convert to fraction form
    170,998.90/256,498.35 = 103,639.30/x
  3. Step 3: Cross multiply
    170,998.90x = 256,498.35 × 103,639.30
  4. Step 4: Simplify right side
    170,998.90x = 26,583,309,445.16
  5. Step 5: Solve for x
    x = 26,583,309,445.16/170,998.90
  6. Step 6: Final answer
    x = 155,458.95

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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.