Home / 90,885.41-136,390.40-31,721.08

Finding the Fourth Proportional to 90,885.41, 136,390.40 and 31,721.08

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Solution

The fourth proportional to 90,885.41, 136,390.40 and 31,721.08 is: 47,603.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,885.41 : 136,390.40 = 31,721.08 : x
  2. Step 2: Convert to fraction form
    90,885.41/136,390.40 = 31,721.08/x
  3. Step 3: Cross multiply
    90,885.41x = 136,390.40 × 31,721.08
  4. Step 4: Simplify right side
    90,885.41x = 4,326,450,107.68
  5. Step 5: Solve for x
    x = 4,326,450,107.68/90,885.41
  6. Step 6: Final answer
    x = 47,603.35

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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.