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Finding the Fourth Proportional to 134,605.92, 185,749.52 and 78,035.68

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Solution

The fourth proportional to 134,605.92, 185,749.52 and 78,035.68 is: 107,685.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,605.92 : 185,749.52 = 78,035.68 : x
  2. Step 2: Convert to fraction form
    134,605.92/185,749.52 = 78,035.68/x
  3. Step 3: Cross multiply
    134,605.92x = 185,749.52 × 78,035.68
  4. Step 4: Simplify right side
    134,605.92x = 14,495,090,102.87
  5. Step 5: Solve for x
    x = 14,495,090,102.87/134,605.92
  6. Step 6: Final answer
    x = 107,685.38

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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.