Home / 129,388.96-178,557.44-72,801.28

Finding the Fourth Proportional to 129,388.96, 178,557.44 and 72,801.28

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Solution

The fourth proportional to 129,388.96, 178,557.44 and 72,801.28 is: 100,466.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,388.96 : 178,557.44 = 72,801.28 : x
  2. Step 2: Convert to fraction form
    129,388.96/178,557.44 = 72,801.28/x
  3. Step 3: Cross multiply
    129,388.96x = 178,557.44 × 72,801.28
  4. Step 4: Simplify right side
    129,388.96x = 12,999,210,185.52
  5. Step 5: Solve for x
    x = 12,999,210,185.52/129,388.96
  6. Step 6: Final answer
    x = 100,466.15

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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.