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Finding the Fourth Proportional to 56,363.58, 77,780.79 and 31,212.54

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Solution

The fourth proportional to 56,363.58, 77,780.79 and 31,212.54 is: 43,072.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,363.58 : 77,780.79 = 31,212.54 : x
  2. Step 2: Convert to fraction form
    56,363.58/77,780.79 = 31,212.54/x
  3. Step 3: Cross multiply
    56,363.58x = 77,780.79 × 31,212.54
  4. Step 4: Simplify right side
    56,363.58x = 2,427,736,019.11
  5. Step 5: Solve for x
    x = 2,427,736,019.11/56,363.58
  6. Step 6: Final answer
    x = 43,072.78

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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.