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Finding the Fourth Proportional to 90,690.70, 136,060.53 and 31,529.65

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Solution

The fourth proportional to 90,690.70, 136,060.53 and 31,529.65 is: 47,302.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,690.70 : 136,060.53 = 31,529.65 : x
  2. Step 2: Convert to fraction form
    90,690.70/136,060.53 = 31,529.65/x
  3. Step 3: Cross multiply
    90,690.70x = 136,060.53 × 31,529.65
  4. Step 4: Simplify right side
    90,690.70x = 4,289,940,889.71
  5. Step 5: Solve for x
    x = 4,289,940,889.71/90,690.70
  6. Step 6: Final answer
    x = 47,302.99

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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.