Home / 91,977.31-126,929.80-51,688.72

Finding the Fourth Proportional to 91,977.31, 126,929.80 and 51,688.72

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Solution

The fourth proportional to 91,977.31, 126,929.80 and 51,688.72 is: 71,331.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,977.31 : 126,929.80 = 51,688.72 : x
  2. Step 2: Convert to fraction form
    91,977.31/126,929.80 = 51,688.72/x
  3. Step 3: Cross multiply
    91,977.31x = 126,929.80 × 51,688.72
  4. Step 4: Simplify right side
    91,977.31x = 6,560,838,891.86
  5. Step 5: Solve for x
    x = 6,560,838,891.86/91,977.31
  6. Step 6: Final answer
    x = 71,331.06

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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.