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Finding the Fourth Proportional to 100,973.46, 139,342.92 and 55,033.03

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Solution

The fourth proportional to 100,973.46, 139,342.92 and 55,033.03 is: 75,945.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,973.46 : 139,342.92 = 55,033.03 : x
  2. Step 2: Convert to fraction form
    100,973.46/139,342.92 = 55,033.03/x
  3. Step 3: Cross multiply
    100,973.46x = 139,342.92 × 55,033.03
  4. Step 4: Simplify right side
    100,973.46x = 7,668,462,399.93
  5. Step 5: Solve for x
    x = 7,668,462,399.93/100,973.46
  6. Step 6: Final answer
    x = 75,945.33

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1.5x scale

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.