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Finding the Fourth Proportional to 123,875.76, 170,949.45 and 67,287.18

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Solution

The fourth proportional to 123,875.76, 170,949.45 and 67,287.18 is: 92,856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,875.76 : 170,949.45 = 67,287.18 : x
  2. Step 2: Convert to fraction form
    123,875.76/170,949.45 = 67,287.18/x
  3. Step 3: Cross multiply
    123,875.76x = 170,949.45 × 67,287.18
  4. Step 4: Simplify right side
    123,875.76x = 11,502,706,413.05
  5. Step 5: Solve for x
    x = 11,502,706,413.05/123,875.76
  6. Step 6: Final answer
    x = 92,856.80

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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.