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Finding the Fourth Proportional to 65,657.88, 90,602.82 and 38,798.28

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Solution

The fourth proportional to 65,657.88, 90,602.82 and 38,798.28 is: 53,538.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,657.88 : 90,602.82 = 38,798.28 : x
  2. Step 2: Convert to fraction form
    65,657.88/90,602.82 = 38,798.28/x
  3. Step 3: Cross multiply
    65,657.88x = 90,602.82 × 38,798.28
  4. Step 4: Simplify right side
    65,657.88x = 3,515,233,579.15
  5. Step 5: Solve for x
    x = 3,515,233,579.15/65,657.88
  6. Step 6: Final answer
    x = 53,538.64

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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.