Home / 77,813.18-107,363.13-51,920.80

Finding the Fourth Proportional to 77,813.18, 107,363.13 and 51,920.80

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Solution

The fourth proportional to 77,813.18, 107,363.13 and 51,920.80 is: 71,638.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,813.18 : 107,363.13 = 51,920.80 : x
  2. Step 2: Convert to fraction form
    77,813.18/107,363.13 = 51,920.80/x
  3. Step 3: Cross multiply
    77,813.18x = 107,363.13 × 51,920.80
  4. Step 4: Simplify right side
    77,813.18x = 5,574,380,181.47
  5. Step 5: Solve for x
    x = 5,574,380,181.47/77,813.18
  6. Step 6: Final answer
    x = 71,638.00

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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.