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Finding the Fourth Proportional to 85,309.82, 128,043.27 and 43,219.18

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Solution

The fourth proportional to 85,309.82, 128,043.27 and 43,219.18 is: 64,868.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,309.82 : 128,043.27 = 43,219.18 : x
  2. Step 2: Convert to fraction form
    85,309.82/128,043.27 = 43,219.18/x
  3. Step 3: Cross multiply
    85,309.82x = 128,043.27 × 43,219.18
  4. Step 4: Simplify right side
    85,309.82x = 5,533,925,413.26
  5. Step 5: Solve for x
    x = 5,533,925,413.26/85,309.82
  6. Step 6: Final answer
    x = 64,868.56

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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.