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Finding the Fourth Proportional to 118,429.72, 177,657.90 and 39,549.40

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Solution

The fourth proportional to 118,429.72, 177,657.90 and 39,549.40 is: 59,328.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,429.72 : 177,657.90 = 39,549.40 : x
  2. Step 2: Convert to fraction form
    118,429.72/177,657.90 = 39,549.40/x
  3. Step 3: Cross multiply
    118,429.72x = 177,657.90 × 39,549.40
  4. Step 4: Simplify right side
    118,429.72x = 7,026,263,350.26
  5. Step 5: Solve for x
    x = 7,026,263,350.26/118,429.72
  6. Step 6: Final answer
    x = 59,328.55

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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.