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Finding the Fourth Proportional to 118,032.72, 177,066.90 and 39,129

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Solution

The fourth proportional to 118,032.72, 177,066.90 and 39,129 is: 58,699.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,032.72 : 177,066.90 = 39,129 : x
  2. Step 2: Convert to fraction form
    118,032.72/177,066.90 = 39,129/x
  3. Step 3: Cross multiply
    118,032.72x = 177,066.90 × 39,129
  4. Step 4: Simplify right side
    118,032.72x = 6,928,450,730.10
  5. Step 5: Solve for x
    x = 6,928,450,730.10/118,032.72
  6. Step 6: Final answer
    x = 58,699.41

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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.