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Finding the Fourth Proportional to 157,706.88, 217,741.68 and 121,343.64

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Solution

The fourth proportional to 157,706.88, 217,741.68 and 121,343.64 is: 167,535.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,706.88 : 217,741.68 = 121,343.64 : x
  2. Step 2: Convert to fraction form
    157,706.88/217,741.68 = 121,343.64/x
  3. Step 3: Cross multiply
    157,706.88x = 217,741.68 × 121,343.64
  4. Step 4: Simplify right side
    157,706.88x = 26,421,568,030.92
  5. Step 5: Solve for x
    x = 26,421,568,030.92/157,706.88
  6. Step 6: Final answer
    x = 167,535.93

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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.