Home / 81,804.08-122,687.86-31,885.52

Finding the Fourth Proportional to 81,804.08, 122,687.86 and 31,885.52

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Solution

The fourth proportional to 81,804.08, 122,687.86 and 31,885.52 is: 47,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,804.08 : 122,687.86 = 31,885.52 : x
  2. Step 2: Convert to fraction form
    81,804.08/122,687.86 = 31,885.52/x
  3. Step 3: Cross multiply
    81,804.08x = 122,687.86 × 31,885.52
  4. Step 4: Simplify right side
    81,804.08x = 3,911,966,213.79
  5. Step 5: Solve for x
    x = 3,911,966,213.79/81,804.08
  6. Step 6: Final answer
    x = 47,821.16

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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.