Home / 81,846.12-122,719.80-31,248.45

Finding the Fourth Proportional to 81,846.12, 122,719.80 and 31,248.45

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Solution

The fourth proportional to 81,846.12, 122,719.80 and 31,248.45 is: 46,853.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,846.12 : 122,719.80 = 31,248.45 : x
  2. Step 2: Convert to fraction form
    81,846.12/122,719.80 = 31,248.45/x
  3. Step 3: Cross multiply
    81,846.12x = 122,719.80 × 31,248.45
  4. Step 4: Simplify right side
    81,846.12x = 3,834,803,534.31
  5. Step 5: Solve for x
    x = 3,834,803,534.31/81,846.12
  6. Step 6: Final answer
    x = 46,853.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.