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Finding the Fourth Proportional to 67,113, 100,669.50 and 17,865

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Solution

The fourth proportional to 67,113, 100,669.50 and 17,865 is: 26,797.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,113 : 100,669.50 = 17,865 : x
  2. Step 2: Convert to fraction form
    67,113/100,669.50 = 17,865/x
  3. Step 3: Cross multiply
    67,113x = 100,669.50 × 17,865
  4. Step 4: Simplify right side
    67,113x = 1,798,460,617.50
  5. Step 5: Solve for x
    x = 1,798,460,617.50/67,113
  6. Step 6: Final answer
    x = 26,797.50

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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.