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Finding the Fourth Proportional to 92,910.52, 128,150.88 and 57,120.64

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Solution

The fourth proportional to 92,910.52, 128,150.88 and 57,120.64 is: 78,786.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,910.52 : 128,150.88 = 57,120.64 : x
  2. Step 2: Convert to fraction form
    92,910.52/128,150.88 = 57,120.64/x
  3. Step 3: Cross multiply
    92,910.52x = 128,150.88 × 57,120.64
  4. Step 4: Simplify right side
    92,910.52x = 7,320,060,282.16
  5. Step 5: Solve for x
    x = 7,320,060,282.16/92,910.52
  6. Step 6: Final answer
    x = 78,786.13

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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.