Home / 105,669.11-145,838.31-65,395.85

Finding the Fourth Proportional to 105,669.11, 145,838.31 and 65,395.85

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Solution

The fourth proportional to 105,669.11, 145,838.31 and 65,395.85 is: 90,255.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,669.11 : 145,838.31 = 65,395.85 : x
  2. Step 2: Convert to fraction form
    105,669.11/145,838.31 = 65,395.85/x
  3. Step 3: Cross multiply
    105,669.11x = 145,838.31 × 65,395.85
  4. Step 4: Simplify right side
    105,669.11x = 9,537,220,245.01
  5. Step 5: Solve for x
    x = 9,537,220,245.01/105,669.11
  6. Step 6: Final answer
    x = 90,255.52

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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.