Home / 128,509.44-177,356.28-74,063.52

Finding the Fourth Proportional to 128,509.44, 177,356.28 and 74,063.52

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Solution

The fourth proportional to 128,509.44, 177,356.28 and 74,063.52 is: 102,215.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,509.44 : 177,356.28 = 74,063.52 : x
  2. Step 2: Convert to fraction form
    128,509.44/177,356.28 = 74,063.52/x
  3. Step 3: Cross multiply
    128,509.44x = 177,356.28 × 74,063.52
  4. Step 4: Simplify right side
    128,509.44x = 13,135,630,390.91
  5. Step 5: Solve for x
    x = 13,135,630,390.91/128,509.44
  6. Step 6: Final answer
    x = 102,215.30

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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.