Home / 102,868.46-142,039.00-78,957.26

Finding the Fourth Proportional to 102,868.46, 142,039.00 and 78,957.26

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Solution

The fourth proportional to 102,868.46, 142,039.00 and 78,957.26 is: 109,022.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,868.46 : 142,039.00 = 78,957.26 : x
  2. Step 2: Convert to fraction form
    102,868.46/142,039.00 = 78,957.26/x
  3. Step 3: Cross multiply
    102,868.46x = 142,039.00 × 78,957.26
  4. Step 4: Simplify right side
    102,868.46x = 11,215,009,345.55
  5. Step 5: Solve for x
    x = 11,215,009,345.55/102,868.46
  6. Step 6: Final answer
    x = 109,022.82

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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.