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Finding the Fourth Proportional to 92,793.12, 128,076.48 and 55,089.12

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Solution

The fourth proportional to 92,793.12, 128,076.48 and 55,089.12 is: 76,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,793.12 : 128,076.48 = 55,089.12 : x
  2. Step 2: Convert to fraction form
    92,793.12/128,076.48 = 55,089.12/x
  3. Step 3: Cross multiply
    92,793.12x = 128,076.48 × 55,089.12
  4. Step 4: Simplify right side
    92,793.12x = 7,055,620,575.90
  5. Step 5: Solve for x
    x = 7,055,620,575.90/92,793.12
  6. Step 6: Final answer
    x = 76,036.03

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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.