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Finding the Fourth Proportional to 65,505.08, 90,393.06 and 38,656

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Solution

The fourth proportional to 65,505.08, 90,393.06 and 38,656 is: 53,342.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,505.08 : 90,393.06 = 38,656 : x
  2. Step 2: Convert to fraction form
    65,505.08/90,393.06 = 38,656/x
  3. Step 3: Cross multiply
    65,505.08x = 90,393.06 × 38,656
  4. Step 4: Simplify right side
    65,505.08x = 3,494,234,127.36
  5. Step 5: Solve for x
    x = 3,494,234,127.36/65,505.08
  6. Step 6: Final answer
    x = 53,342.95

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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.