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Finding the Fourth Proportional to 157,245.21, 216,941.40 and 89,222.79

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Solution

The fourth proportional to 157,245.21, 216,941.40 and 89,222.79 is: 123,095.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,245.21 : 216,941.40 = 89,222.79 : x
  2. Step 2: Convert to fraction form
    157,245.21/216,941.40 = 89,222.79/x
  3. Step 3: Cross multiply
    157,245.21x = 216,941.40 × 89,222.79
  4. Step 4: Simplify right side
    157,245.21x = 19,356,116,974.51
  5. Step 5: Solve for x
    x = 19,356,116,974.51/157,245.21
  6. Step 6: Final answer
    x = 123,095.11

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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.