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Finding the Fourth Proportional to 123,639, 170,621.88 and 67,050.48

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Solution

The fourth proportional to 123,639, 170,621.88 and 67,050.48 is: 92,529.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,639 : 170,621.88 = 67,050.48 : x
  2. Step 2: Convert to fraction form
    123,639/170,621.88 = 67,050.48/x
  3. Step 3: Cross multiply
    123,639x = 170,621.88 × 67,050.48
  4. Step 4: Simplify right side
    123,639x = 11,440,278,952.50
  5. Step 5: Solve for x
    x = 11,440,278,952.50/123,639
  6. Step 6: Final answer
    x = 92,529.69

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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.