Home / 77,985.56-107,630.70-47,772.56

Finding the Fourth Proportional to 77,985.56, 107,630.70 and 47,772.56

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Solution

The fourth proportional to 77,985.56, 107,630.70 and 47,772.56 is: 65,932.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,985.56 : 107,630.70 = 47,772.56 : x
  2. Step 2: Convert to fraction form
    77,985.56/107,630.70 = 47,772.56/x
  3. Step 3: Cross multiply
    77,985.56x = 107,630.70 × 47,772.56
  4. Step 4: Simplify right side
    77,985.56x = 5,141,794,073.59
  5. Step 5: Solve for x
    x = 5,141,794,073.59/77,985.56
  6. Step 6: Final answer
    x = 65,932.64

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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.