Home / 90,931.62-136,397.79-31,767.06

Finding the Fourth Proportional to 90,931.62, 136,397.79 and 31,767.06

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Solution

The fourth proportional to 90,931.62, 136,397.79 and 31,767.06 is: 47,650.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,931.62 : 136,397.79 = 31,767.06 : x
  2. Step 2: Convert to fraction form
    90,931.62/136,397.79 = 31,767.06/x
  3. Step 3: Cross multiply
    90,931.62x = 136,397.79 × 31,767.06
  4. Step 4: Simplify right side
    90,931.62x = 4,332,956,778.80
  5. Step 5: Solve for x
    x = 4,332,956,778.80/90,931.62
  6. Step 6: Final answer
    x = 47,650.72

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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.