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Finding the Fourth Proportional to 90,783.70, 125,285.07 and 54,953.44

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Solution

The fourth proportional to 90,783.70, 125,285.07 and 54,953.44 is: 75,837.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.70 : 125,285.07 = 54,953.44 : x
  2. Step 2: Convert to fraction form
    90,783.70/125,285.07 = 54,953.44/x
  3. Step 3: Cross multiply
    90,783.70x = 125,285.07 × 54,953.44
  4. Step 4: Simplify right side
    90,783.70x = 6,884,845,577.14
  5. Step 5: Solve for x
    x = 6,884,845,577.14/90,783.70
  6. Step 6: Final answer
    x = 75,837.90

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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.