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Finding the Fourth Proportional to 100,762.93, 139,052.81 and 55,439.96

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Solution

The fourth proportional to 100,762.93, 139,052.81 and 55,439.96 is: 76,507.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.93 : 139,052.81 = 55,439.96 : x
  2. Step 2: Convert to fraction form
    100,762.93/139,052.81 = 55,439.96/x
  3. Step 3: Cross multiply
    100,762.93x = 139,052.81 × 55,439.96
  4. Step 4: Simplify right side
    100,762.93x = 7,709,081,947.09
  5. Step 5: Solve for x
    x = 7,709,081,947.09/100,762.93
  6. Step 6: Final answer
    x = 76,507.13

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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.