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Finding the Fourth Proportional to 76,999.77, 115,338.55 and 61,925.41

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Solution

The fourth proportional to 76,999.77, 115,338.55 and 61,925.41 is: 92,758.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,999.77 : 115,338.55 = 61,925.41 : x
  2. Step 2: Convert to fraction form
    76,999.77/115,338.55 = 61,925.41/x
  3. Step 3: Cross multiply
    76,999.77x = 115,338.55 × 61,925.41
  4. Step 4: Simplify right side
    76,999.77x = 7,142,386,877.69
  5. Step 5: Solve for x
    x = 7,142,386,877.69/76,999.77
  6. Step 6: Final answer
    x = 92,758.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.