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Finding the Fourth Proportional to 141,931, 212,896.50 and 79,606.36

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Solution

The fourth proportional to 141,931, 212,896.50 and 79,606.36 is: 119,409.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,931 : 212,896.50 = 79,606.36 : x
  2. Step 2: Convert to fraction form
    141,931/212,896.50 = 79,606.36/x
  3. Step 3: Cross multiply
    141,931x = 212,896.50 × 79,606.36
  4. Step 4: Simplify right side
    141,931x = 16,947,915,421.74
  5. Step 5: Solve for x
    x = 16,947,915,421.74/141,931
  6. Step 6: Final answer
    x = 119,409.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.