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Finding the Fourth Proportional to 153,950.78, 212,391.63 and 89,409.03

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Solution

The fourth proportional to 153,950.78, 212,391.63 and 89,409.03 is: 123,349.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,950.78 : 212,391.63 = 89,409.03 : x
  2. Step 2: Convert to fraction form
    153,950.78/212,391.63 = 89,409.03/x
  3. Step 3: Cross multiply
    153,950.78x = 212,391.63 × 89,409.03
  4. Step 4: Simplify right side
    153,950.78x = 18,989,729,618.42
  5. Step 5: Solve for x
    x = 18,989,729,618.42/153,950.78
  6. Step 6: Final answer
    x = 123,349.36

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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.