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Finding the Fourth Proportional to 157,079.88, 216,850.50 and 121,189.32

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Solution

The fourth proportional to 157,079.88, 216,850.50 and 121,189.32 is: 167,303.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,079.88 : 216,850.50 = 121,189.32 : x
  2. Step 2: Convert to fraction form
    157,079.88/216,850.50 = 121,189.32/x
  3. Step 3: Cross multiply
    157,079.88x = 216,850.50 × 121,189.32
  4. Step 4: Simplify right side
    157,079.88x = 26,279,964,636.66
  5. Step 5: Solve for x
    x = 26,279,964,636.66/157,079.88
  6. Step 6: Final answer
    x = 167,303.19

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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.