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Finding the Fourth Proportional to 124,510.77, 186,893.27 and 91,131.68

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Solution

The fourth proportional to 124,510.77, 186,893.27 and 91,131.68 is: 136,790.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,510.77 : 186,893.27 = 91,131.68 : x
  2. Step 2: Convert to fraction form
    124,510.77/186,893.27 = 91,131.68/x
  3. Step 3: Cross multiply
    124,510.77x = 186,893.27 × 91,131.68
  4. Step 4: Simplify right side
    124,510.77x = 17,031,898,541.73
  5. Step 5: Solve for x
    x = 17,031,898,541.73/124,510.77
  6. Step 6: Final answer
    x = 136,790.56

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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.