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Finding the Fourth Proportional to 120,143.50, 165,798.03 and 67,151.50

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Solution

The fourth proportional to 120,143.50, 165,798.03 and 67,151.50 is: 92,669.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.50 : 165,798.03 = 67,151.50 : x
  2. Step 2: Convert to fraction form
    120,143.50/165,798.03 = 67,151.50/x
  3. Step 3: Cross multiply
    120,143.50x = 165,798.03 × 67,151.50
  4. Step 4: Simplify right side
    120,143.50x = 11,133,586,411.55
  5. Step 5: Solve for x
    x = 11,133,586,411.55/120,143.50
  6. Step 6: Final answer
    x = 92,669.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.