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Finding the Fourth Proportional to 171,710.80, 257,566.20 and 76,940.80

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Solution

The fourth proportional to 171,710.80, 257,566.20 and 76,940.80 is: 115,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,710.80 : 257,566.20 = 76,940.80 : x
  2. Step 2: Convert to fraction form
    171,710.80/257,566.20 = 76,940.80/x
  3. Step 3: Cross multiply
    171,710.80x = 257,566.20 × 76,940.80
  4. Step 4: Simplify right side
    171,710.80x = 19,817,349,480.96
  5. Step 5: Solve for x
    x = 19,817,349,480.96/171,710.80
  6. Step 6: Final answer
    x = 115,411.20

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1.5x scale

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.