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Finding the Fourth Proportional to 100,803.52, 139,050.92 and 63,012.16

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Solution

The fourth proportional to 100,803.52, 139,050.92 and 63,012.16 is: 86,920.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,803.52 : 139,050.92 = 63,012.16 : x
  2. Step 2: Convert to fraction form
    100,803.52/139,050.92 = 63,012.16/x
  3. Step 3: Cross multiply
    100,803.52x = 139,050.92 × 63,012.16
  4. Step 4: Simplify right side
    100,803.52x = 8,761,898,629.09
  5. Step 5: Solve for x
    x = 8,761,898,629.09/100,803.52
  6. Step 6: Final answer
    x = 86,920.56

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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.