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Finding the Fourth Proportional to 56,385.26, 77,810.72 and 30,891.39

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Solution

The fourth proportional to 56,385.26, 77,810.72 and 30,891.39 is: 42,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,385.26 : 77,810.72 = 30,891.39 : x
  2. Step 2: Convert to fraction form
    56,385.26/77,810.72 = 30,891.39/x
  3. Step 3: Cross multiply
    56,385.26x = 77,810.72 × 30,891.39
  4. Step 4: Simplify right side
    56,385.26x = 2,403,681,297.70
  5. Step 5: Solve for x
    x = 2,403,681,297.70/56,385.26
  6. Step 6: Final answer
    x = 42,629.60

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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.