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Finding the Fourth Proportional to 124,438.88, 171,671 and 84,138.06

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Solution

The fourth proportional to 124,438.88, 171,671 and 84,138.06 is: 116,073.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,438.88 : 171,671 = 84,138.06 : x
  2. Step 2: Convert to fraction form
    124,438.88/171,671 = 84,138.06/x
  3. Step 3: Cross multiply
    124,438.88x = 171,671 × 84,138.06
  4. Step 4: Simplify right side
    124,438.88x = 14,444,064,898.26
  5. Step 5: Solve for x
    x = 14,444,064,898.26/124,438.88
  6. Step 6: Final answer
    x = 116,073.57

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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.