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Finding the Fourth Proportional to 171,237.60, 256,851.60 and 77,743.20

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Solution

The fourth proportional to 171,237.60, 256,851.60 and 77,743.20 is: 116,612.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,237.60 : 256,851.60 = 77,743.20 : x
  2. Step 2: Convert to fraction form
    171,237.60/256,851.60 = 77,743.20/x
  3. Step 3: Cross multiply
    171,237.60x = 256,851.60 × 77,743.20
  4. Step 4: Simplify right side
    171,237.60x = 19,968,465,309.12
  5. Step 5: Solve for x
    x = 19,968,465,309.12/171,237.60
  6. Step 6: Final answer
    x = 116,612.62

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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.