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Finding the Fourth Proportional to 77,322.75, 106,703.60 and 45,493.71

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Solution

The fourth proportional to 77,322.75, 106,703.60 and 45,493.71 is: 62,780.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,322.75 : 106,703.60 = 45,493.71 : x
  2. Step 2: Convert to fraction form
    77,322.75/106,703.60 = 45,493.71/x
  3. Step 3: Cross multiply
    77,322.75x = 106,703.60 × 45,493.71
  4. Step 4: Simplify right side
    77,322.75x = 4,854,342,406.89
  5. Step 5: Solve for x
    x = 4,854,342,406.89/77,322.75
  6. Step 6: Final answer
    x = 62,780.26

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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.