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Finding the Fourth Proportional to 78,150.33, 116,890.59 and 72,477.81

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Solution

The fourth proportional to 78,150.33, 116,890.59 and 72,477.81 is: 108,406.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.33 : 116,890.59 = 72,477.81 : x
  2. Step 2: Convert to fraction form
    78,150.33/116,890.59 = 72,477.81/x
  3. Step 3: Cross multiply
    78,150.33x = 116,890.59 × 72,477.81
  4. Step 4: Simplify right side
    78,150.33x = 8,471,973,972.81
  5. Step 5: Solve for x
    x = 8,471,973,972.81/78,150.33
  6. Step 6: Final answer
    x = 108,406.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.