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Finding the Fourth Proportional to 157,488.33, 217,329.15 and 85,869.75

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Solution

The fourth proportional to 157,488.33, 217,329.15 and 85,869.75 is: 118,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,488.33 : 217,329.15 = 85,869.75 : x
  2. Step 2: Convert to fraction form
    157,488.33/217,329.15 = 85,869.75/x
  3. Step 3: Cross multiply
    157,488.33x = 217,329.15 × 85,869.75
  4. Step 4: Simplify right side
    157,488.33x = 18,661,999,778.21
  5. Step 5: Solve for x
    x = 18,661,999,778.21/157,488.33
  6. Step 6: Final answer
    x = 118,497.67

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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.