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Finding the Fourth Proportional to 56,578.68, 78,078.80 and 31,087.11

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Solution

The fourth proportional to 56,578.68, 78,078.80 and 31,087.11 is: 42,900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,578.68 : 78,078.80 = 31,087.11 : x
  2. Step 2: Convert to fraction form
    56,578.68/78,078.80 = 31,087.11/x
  3. Step 3: Cross multiply
    56,578.68x = 78,078.80 × 31,087.11
  4. Step 4: Simplify right side
    56,578.68x = 2,427,244,244.27
  5. Step 5: Solve for x
    x = 2,427,244,244.27/56,578.68
  6. Step 6: Final answer
    x = 42,900.33

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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.