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Finding the Fourth Proportional to 74,709.60, 103,054.32 and 58,768.80

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Solution

The fourth proportional to 74,709.60, 103,054.32 and 58,768.80 is: 81,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,709.60 : 103,054.32 = 58,768.80 : x
  2. Step 2: Convert to fraction form
    74,709.60/103,054.32 = 58,768.80/x
  3. Step 3: Cross multiply
    74,709.60x = 103,054.32 × 58,768.80
  4. Step 4: Simplify right side
    74,709.60x = 6,056,378,721.22
  5. Step 5: Solve for x
    x = 6,056,378,721.22/74,709.60
  6. Step 6: Final answer
    x = 81,065.60

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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.