Home / 81,557.02-112,491.77-78,813.75

Finding the Fourth Proportional to 81,557.02, 112,491.77 and 78,813.75

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Solution

The fourth proportional to 81,557.02, 112,491.77 and 78,813.75 is: 108,707.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,557.02 : 112,491.77 = 78,813.75 : x
  2. Step 2: Convert to fraction form
    81,557.02/112,491.77 = 78,813.75/x
  3. Step 3: Cross multiply
    81,557.02x = 112,491.77 × 78,813.75
  4. Step 4: Simplify right side
    81,557.02x = 8,865,898,237.84
  5. Step 5: Solve for x
    x = 8,865,898,237.84/81,557.02
  6. Step 6: Final answer
    x = 108,707.97

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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.