Home / 81,569.61-122,339.84-51,899.31

Finding the Fourth Proportional to 81,569.61, 122,339.84 and 51,899.31

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Solution

The fourth proportional to 81,569.61, 122,339.84 and 51,899.31 is: 77,839.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,569.61 : 122,339.84 = 51,899.31 : x
  2. Step 2: Convert to fraction form
    81,569.61/122,339.84 = 51,899.31/x
  3. Step 3: Cross multiply
    81,569.61x = 122,339.84 × 51,899.31
  4. Step 4: Simplify right side
    81,569.61x = 6,349,353,022.01
  5. Step 5: Solve for x
    x = 6,349,353,022.01/81,569.61
  6. Step 6: Final answer
    x = 77,839.69

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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.