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Finding the Fourth Proportional to 218,758.16, 328,155.77 and 60,986.76

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Solution

The fourth proportional to 218,758.16, 328,155.77 and 60,986.76 is: 91,485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,758.16 : 328,155.77 = 60,986.76 : x
  2. Step 2: Convert to fraction form
    218,758.16/328,155.77 = 60,986.76/x
  3. Step 3: Cross multiply
    218,758.16x = 328,155.77 × 60,986.76
  4. Step 4: Simplify right side
    218,758.16x = 20,013,157,703.06
  5. Step 5: Solve for x
    x = 20,013,157,703.06/218,758.16
  6. Step 6: Final answer
    x = 91,485.31

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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.