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Finding the Fourth Proportional to 90,644.98, 125,107.96 and 57,918.46

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Solution

The fourth proportional to 90,644.98, 125,107.96 and 57,918.46 is: 79,938.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644.98 : 125,107.96 = 57,918.46 : x
  2. Step 2: Convert to fraction form
    90,644.98/125,107.96 = 57,918.46/x
  3. Step 3: Cross multiply
    90,644.98x = 125,107.96 × 57,918.46
  4. Step 4: Simplify right side
    90,644.98x = 7,246,059,751.40
  5. Step 5: Solve for x
    x = 7,246,059,751.40/90,644.98
  6. Step 6: Final answer
    x = 79,938.90

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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.