Home / 81,397.40-122,137.73-38,751.02

Finding the Fourth Proportional to 81,397.40, 122,137.73 and 38,751.02

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Solution

The fourth proportional to 81,397.40, 122,137.73 and 38,751.02 is: 58,146.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,397.40 : 122,137.73 = 38,751.02 : x
  2. Step 2: Convert to fraction form
    81,397.40/122,137.73 = 38,751.02/x
  3. Step 3: Cross multiply
    81,397.40x = 122,137.73 × 38,751.02
  4. Step 4: Simplify right side
    81,397.40x = 4,732,961,617.98
  5. Step 5: Solve for x
    x = 4,732,961,617.98/81,397.40
  6. Step 6: Final answer
    x = 58,146.35

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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.