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Finding the Fourth Proportional to 157,392.21, 217,194.93 and 85,770.71

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Solution

The fourth proportional to 157,392.21, 217,194.93 and 85,770.71 is: 118,360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,392.21 : 217,194.93 = 85,770.71 : x
  2. Step 2: Convert to fraction form
    157,392.21/217,194.93 = 85,770.71/x
  3. Step 3: Cross multiply
    157,392.21x = 217,194.93 × 85,770.71
  4. Step 4: Simplify right side
    157,392.21x = 18,628,962,268.53
  5. Step 5: Solve for x
    x = 18,628,962,268.53/157,392.21
  6. Step 6: Final answer
    x = 118,360.13

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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.