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Finding the Fourth Proportional to 65,747.56, 90,503.58 and 57,349.48

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Solution

The fourth proportional to 65,747.56, 90,503.58 and 57,349.48 is: 78,943.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,747.56 : 90,503.58 = 57,349.48 : x
  2. Step 2: Convert to fraction form
    65,747.56/90,503.58 = 57,349.48/x
  3. Step 3: Cross multiply
    65,747.56x = 90,503.58 × 57,349.48
  4. Step 4: Simplify right side
    65,747.56x = 5,190,333,251.14
  5. Step 5: Solve for x
    x = 5,190,333,251.14/65,747.56
  6. Step 6: Final answer
    x = 78,943.36

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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.