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Finding the Fourth Proportional to 77,345.56, 106,743.56 and 45,078.48

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Solution

The fourth proportional to 77,345.56, 106,743.56 and 45,078.48 is: 62,212.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,345.56 : 106,743.56 = 45,078.48 : x
  2. Step 2: Convert to fraction form
    77,345.56/106,743.56 = 45,078.48/x
  3. Step 3: Cross multiply
    77,345.56x = 106,743.56 × 45,078.48
  4. Step 4: Simplify right side
    77,345.56x = 4,811,837,434.59
  5. Step 5: Solve for x
    x = 4,811,837,434.59/77,345.56
  6. Step 6: Final answer
    x = 62,212.20

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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.