Home / 81,570.11-122,340.59-51,899.81

Finding the Fourth Proportional to 81,570.11, 122,340.59 and 51,899.81

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Solution

The fourth proportional to 81,570.11, 122,340.59 and 51,899.81 is: 77,840.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,570.11 : 122,340.59 = 51,899.81 : x
  2. Step 2: Convert to fraction form
    81,570.11/122,340.59 = 51,899.81/x
  3. Step 3: Cross multiply
    81,570.11x = 122,340.59 × 51,899.81
  4. Step 4: Simplify right side
    81,570.11x = 6,349,453,376.29
  5. Step 5: Solve for x
    x = 6,349,453,376.29/81,570.11
  6. Step 6: Final answer
    x = 77,840.44

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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.