Home / 81,013.24-121,490.70-34,269.40

Finding the Fourth Proportional to 81,013.24, 121,490.70 and 34,269.40

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Solution

The fourth proportional to 81,013.24, 121,490.70 and 34,269.40 is: 51,391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.24 : 121,490.70 = 34,269.40 : x
  2. Step 2: Convert to fraction form
    81,013.24/121,490.70 = 34,269.40/x
  3. Step 3: Cross multiply
    81,013.24x = 121,490.70 × 34,269.40
  4. Step 4: Simplify right side
    81,013.24x = 4,163,413,394.58
  5. Step 5: Solve for x
    x = 4,163,413,394.58/81,013.24
  6. Step 6: Final answer
    x = 51,391.77

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1.5x scale

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.