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Finding the Fourth Proportional to 124,550.51, 171,903.14 and 78,004.94

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Solution

The fourth proportional to 124,550.51, 171,903.14 and 78,004.94 is: 107,661.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,550.51 : 171,903.14 = 78,004.94 : x
  2. Step 2: Convert to fraction form
    124,550.51/171,903.14 = 78,004.94/x
  3. Step 3: Cross multiply
    124,550.51x = 171,903.14 × 78,004.94
  4. Step 4: Simplify right side
    124,550.51x = 13,409,294,121.51
  5. Step 5: Solve for x
    x = 13,409,294,121.51/124,550.51
  6. Step 6: Final answer
    x = 107,661.50

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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.