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Finding the Fourth Proportional to 157,217.21, 216,961.70 and 85,597.21

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Solution

The fourth proportional to 157,217.21, 216,961.70 and 85,597.21 is: 118,125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,217.21 : 216,961.70 = 85,597.21 : x
  2. Step 2: Convert to fraction form
    157,217.21/216,961.70 = 85,597.21/x
  3. Step 3: Cross multiply
    157,217.21x = 216,961.70 × 85,597.21
  4. Step 4: Simplify right side
    157,217.21x = 18,571,316,196.86
  5. Step 5: Solve for x
    x = 18,571,316,196.86/157,217.21
  6. Step 6: Final answer
    x = 118,125.21

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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.