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Finding the Fourth Proportional to 157,423.21, 217,241.52 and 85,803.82

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Solution

The fourth proportional to 157,423.21, 217,241.52 and 85,803.82 is: 118,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,423.21 : 217,241.52 = 85,803.82 : x
  2. Step 2: Convert to fraction form
    157,423.21/217,241.52 = 85,803.82/x
  3. Step 3: Cross multiply
    157,423.21x = 217,241.52 × 85,803.82
  4. Step 4: Simplify right side
    157,423.21x = 18,640,152,278.61
  5. Step 5: Solve for x
    x = 18,640,152,278.61/157,423.21
  6. Step 6: Final answer
    x = 118,407.90

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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.