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Finding the Fourth Proportional to 77,895.60, 107,509.92 and 74,345.82

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Solution

The fourth proportional to 77,895.60, 107,509.92 and 74,345.82 is: 102,610.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,895.60 : 107,509.92 = 74,345.82 : x
  2. Step 2: Convert to fraction form
    77,895.60/107,509.92 = 74,345.82/x
  3. Step 3: Cross multiply
    77,895.60x = 107,509.92 × 74,345.82
  4. Step 4: Simplify right side
    77,895.60x = 7,992,913,160.53
  5. Step 5: Solve for x
    x = 7,992,913,160.53/77,895.60
  6. Step 6: Final answer
    x = 102,610.59

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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.