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Finding the Fourth Proportional to 207,358.60, 311,037.90 and 89,009.80

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Solution

The fourth proportional to 207,358.60, 311,037.90 and 89,009.80 is: 133,514.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,358.60 : 311,037.90 = 89,009.80 : x
  2. Step 2: Convert to fraction form
    207,358.60/311,037.90 = 89,009.80/x
  3. Step 3: Cross multiply
    207,358.60x = 311,037.90 × 89,009.80
  4. Step 4: Simplify right side
    207,358.60x = 27,685,421,271.42
  5. Step 5: Solve for x
    x = 27,685,421,271.42/207,358.60
  6. Step 6: Final answer
    x = 133,514.70

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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.