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Finding the Fourth Proportional to 139,045.50, 206,779.57 and 134,616.78

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Solution

The fourth proportional to 139,045.50, 206,779.57 and 134,616.78 is: 200,193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,045.50 : 206,779.57 = 134,616.78 : x
  2. Step 2: Convert to fraction form
    139,045.50/206,779.57 = 134,616.78/x
  3. Step 3: Cross multiply
    139,045.50x = 206,779.57 × 134,616.78
  4. Step 4: Simplify right side
    139,045.50x = 27,835,999,546.64
  5. Step 5: Solve for x
    x = 27,835,999,546.64/139,045.50
  6. Step 6: Final answer
    x = 200,193.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.