Home / 100,815.06-139,125.28-55,497.58

Finding the Fourth Proportional to 100,815.06, 139,125.28 and 55,497.58

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Solution

The fourth proportional to 100,815.06, 139,125.28 and 55,497.58 is: 76,586.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,815.06 : 139,125.28 = 55,497.58 : x
  2. Step 2: Convert to fraction form
    100,815.06/139,125.28 = 55,497.58/x
  3. Step 3: Cross multiply
    100,815.06x = 139,125.28 × 55,497.58
  4. Step 4: Simplify right side
    100,815.06x = 7,721,116,356.82
  5. Step 5: Solve for x
    x = 7,721,116,356.82/100,815.06
  6. Step 6: Final answer
    x = 76,586.93

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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.