Home / 77,640.36-107,125.60-56,382.72

Finding the Fourth Proportional to 77,640.36, 107,125.60 and 56,382.72

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Solution

The fourth proportional to 77,640.36, 107,125.60 and 56,382.72 is: 77,795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,640.36 : 107,125.60 = 56,382.72 : x
  2. Step 2: Convert to fraction form
    77,640.36/107,125.60 = 56,382.72/x
  3. Step 3: Cross multiply
    77,640.36x = 107,125.60 × 56,382.72
  4. Step 4: Simplify right side
    77,640.36x = 6,040,032,709.63
  5. Step 5: Solve for x
    x = 6,040,032,709.63/77,640.36
  6. Step 6: Final answer
    x = 77,795.01

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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.