Home / 77,173.10-115,680.70-52,215.78

Finding the Fourth Proportional to 77,173.10, 115,680.70 and 52,215.78

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Solution

The fourth proportional to 77,173.10, 115,680.70 and 52,215.78 is: 78,270.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,173.10 : 115,680.70 = 52,215.78 : x
  2. Step 2: Convert to fraction form
    77,173.10/115,680.70 = 52,215.78/x
  3. Step 3: Cross multiply
    77,173.10x = 115,680.70 × 52,215.78
  4. Step 4: Simplify right side
    77,173.10x = 6,040,357,981.45
  5. Step 5: Solve for x
    x = 6,040,357,981.45/77,173.10
  6. Step 6: Final answer
    x = 78,270.25

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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.