Home / 90,979.40-136,469.10-31,808.90

Finding the Fourth Proportional to 90,979.40, 136,469.10 and 31,808.90

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Solution

The fourth proportional to 90,979.40, 136,469.10 and 31,808.90 is: 47,713.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,979.40 : 136,469.10 = 31,808.90 : x
  2. Step 2: Convert to fraction form
    90,979.40/136,469.10 = 31,808.90/x
  3. Step 3: Cross multiply
    90,979.40x = 136,469.10 × 31,808.90
  4. Step 4: Simplify right side
    90,979.40x = 4,340,931,954.99
  5. Step 5: Solve for x
    x = 4,340,931,954.99/90,979.40
  6. Step 6: Final answer
    x = 47,713.35

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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.