Home / 99,647.08-137,512.90-57,208.20

Finding the Fourth Proportional to 99,647.08, 137,512.90 and 57,208.20

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Solution

The fourth proportional to 99,647.08, 137,512.90 and 57,208.20 is: 78,947.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647.08 : 137,512.90 = 57,208.20 : x
  2. Step 2: Convert to fraction form
    99,647.08/137,512.90 = 57,208.20/x
  3. Step 3: Cross multiply
    99,647.08x = 137,512.90 × 57,208.20
  4. Step 4: Simplify right side
    99,647.08x = 7,866,865,485.78
  5. Step 5: Solve for x
    x = 7,866,865,485.78/99,647.08
  6. Step 6: Final answer
    x = 78,947.28

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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.