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Finding the Fourth Proportional to 155,912.57, 215,159.36 and 84,292.57

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Solution

The fourth proportional to 155,912.57, 215,159.36 and 84,292.57 is: 116,323.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,912.57 : 215,159.36 = 84,292.57 : x
  2. Step 2: Convert to fraction form
    155,912.57/215,159.36 = 84,292.57/x
  3. Step 3: Cross multiply
    155,912.57x = 215,159.36 × 84,292.57
  4. Step 4: Simplify right side
    155,912.57x = 18,136,335,413.96
  5. Step 5: Solve for x
    x = 18,136,335,413.96/155,912.57
  6. Step 6: Final answer
    x = 116,323.75

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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.