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Finding the Fourth Proportional to 92,907.80, 128,215.14 and 52,620.97

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Solution

The fourth proportional to 92,907.80, 128,215.14 and 52,620.97 is: 72,618.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,907.80 : 128,215.14 = 52,620.97 : x
  2. Step 2: Convert to fraction form
    92,907.80/128,215.14 = 52,620.97/x
  3. Step 3: Cross multiply
    92,907.80x = 128,215.14 × 52,620.97
  4. Step 4: Simplify right side
    92,907.80x = 6,746,804,131.31
  5. Step 5: Solve for x
    x = 6,746,804,131.31/92,907.80
  6. Step 6: Final answer
    x = 72,618.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.