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Finding the Fourth Proportional to 216,755.80, 325,190.40 and 83,640.40

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Solution

The fourth proportional to 216,755.80, 325,190.40 and 83,640.40 is: 125,482.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,755.80 : 325,190.40 = 83,640.40 : x
  2. Step 2: Convert to fraction form
    216,755.80/325,190.40 = 83,640.40/x
  3. Step 3: Cross multiply
    216,755.80x = 325,190.40 × 83,640.40
  4. Step 4: Simplify right side
    216,755.80x = 27,199,055,132.16
  5. Step 5: Solve for x
    x = 27,199,055,132.16/216,755.80
  6. Step 6: Final answer
    x = 125,482.48

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1.5x scale

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.