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Finding the Fourth Proportional to 171,907.20, 257,925.60 and 83,239.20

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Solution

The fourth proportional to 171,907.20, 257,925.60 and 83,239.20 is: 124,890.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,907.20 : 257,925.60 = 83,239.20 : x
  2. Step 2: Convert to fraction form
    171,907.20/257,925.60 = 83,239.20/x
  3. Step 3: Cross multiply
    171,907.20x = 257,925.60 × 83,239.20
  4. Step 4: Simplify right side
    171,907.20x = 21,469,520,603.52
  5. Step 5: Solve for x
    x = 21,469,520,603.52/171,907.20
  6. Step 6: Final answer
    x = 124,890.18

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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.