Home / 102,881.08-142,056.44-78,969.88

Finding the Fourth Proportional to 102,881.08, 142,056.44 and 78,969.88

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Solution

The fourth proportional to 102,881.08, 142,056.44 and 78,969.88 is: 109,040.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,881.08 : 142,056.44 = 78,969.88 : x
  2. Step 2: Convert to fraction form
    102,881.08/142,056.44 = 78,969.88/x
  3. Step 3: Cross multiply
    102,881.08x = 142,056.44 × 78,969.88
  4. Step 4: Simplify right side
    102,881.08x = 11,218,180,020.03
  5. Step 5: Solve for x
    x = 11,218,180,020.03/102,881.08
  6. Step 6: Final answer
    x = 109,040.26

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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.