Home / 77,815.36-107,389.19-47,591.20

Finding the Fourth Proportional to 77,815.36, 107,389.19 and 47,591.20

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Solution

The fourth proportional to 77,815.36, 107,389.19 and 47,591.20 is: 65,678.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,815.36 : 107,389.19 = 47,591.20 : x
  2. Step 2: Convert to fraction form
    77,815.36/107,389.19 = 47,591.20/x
  3. Step 3: Cross multiply
    77,815.36x = 107,389.19 × 47,591.20
  4. Step 4: Simplify right side
    77,815.36x = 5,110,780,068.28
  5. Step 5: Solve for x
    x = 5,110,780,068.28/77,815.36
  6. Step 6: Final answer
    x = 65,678.30

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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.