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Finding the Fourth Proportional to 105,495.63, 145,578.51 and 57,739.92

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Solution

The fourth proportional to 105,495.63, 145,578.51 and 57,739.92 is: 79,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,495.63 : 145,578.51 = 57,739.92 : x
  2. Step 2: Convert to fraction form
    105,495.63/145,578.51 = 57,739.92/x
  3. Step 3: Cross multiply
    105,495.63x = 145,578.51 × 57,739.92
  4. Step 4: Simplify right side
    105,495.63x = 8,405,691,521.12
  5. Step 5: Solve for x
    x = 8,405,691,521.12/105,495.63
  6. Step 6: Final answer
    x = 79,678.10

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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.