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Finding the Fourth Proportional to 101,392.12, 139,915.54 and 56,067.48

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Solution

The fourth proportional to 101,392.12, 139,915.54 and 56,067.48 is: 77,370.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,392.12 : 139,915.54 = 56,067.48 : x
  2. Step 2: Convert to fraction form
    101,392.12/139,915.54 = 56,067.48/x
  3. Step 3: Cross multiply
    101,392.12x = 139,915.54 × 56,067.48
  4. Step 4: Simplify right side
    101,392.12x = 7,844,711,740.64
  5. Step 5: Solve for x
    x = 7,844,711,740.64/101,392.12
  6. Step 6: Final answer
    x = 77,370.03

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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.