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Finding the Fourth Proportional to 155,697.59, 214,863.34 and 87,715.38

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Solution

The fourth proportional to 155,697.59, 214,863.34 and 87,715.38 is: 121,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,697.59 : 214,863.34 = 87,715.38 : x
  2. Step 2: Convert to fraction form
    155,697.59/214,863.34 = 87,715.38/x
  3. Step 3: Cross multiply
    155,697.59x = 214,863.34 × 87,715.38
  4. Step 4: Simplify right side
    155,697.59x = 18,846,819,296.88
  5. Step 5: Solve for x
    x = 18,846,819,296.88/155,697.59
  6. Step 6: Final answer
    x = 121,047.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.