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Finding the Fourth Proportional to 88,921.80, 122,728.50 and 57,130.44

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Solution

The fourth proportional to 88,921.80, 122,728.50 and 57,130.44 is: 78,850.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,921.80 : 122,728.50 = 57,130.44 : x
  2. Step 2: Convert to fraction form
    88,921.80/122,728.50 = 57,130.44/x
  3. Step 3: Cross multiply
    88,921.80x = 122,728.50 × 57,130.44
  4. Step 4: Simplify right side
    88,921.80x = 7,011,533,205.54
  5. Step 5: Solve for x
    x = 7,011,533,205.54/88,921.80
  6. Step 6: Final answer
    x = 78,850.55

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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.