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Finding the Fourth Proportional to 92,628.63, 138,932.10 and 39,328.56

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Solution

The fourth proportional to 92,628.63, 138,932.10 and 39,328.56 is: 58,988.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,628.63 : 138,932.10 = 39,328.56 : x
  2. Step 2: Convert to fraction form
    92,628.63/138,932.10 = 39,328.56/x
  3. Step 3: Cross multiply
    92,628.63x = 138,932.10 × 39,328.56
  4. Step 4: Simplify right side
    92,628.63x = 5,463,999,430.78
  5. Step 5: Solve for x
    x = 5,463,999,430.78/92,628.63
  6. Step 6: Final answer
    x = 58,988.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.