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Finding the Fourth Proportional to 139,580.64, 209,368.26 and 39,741.48

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Solution

The fourth proportional to 139,580.64, 209,368.26 and 39,741.48 is: 59,611.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,580.64 : 209,368.26 = 39,741.48 : x
  2. Step 2: Convert to fraction form
    139,580.64/209,368.26 = 39,741.48/x
  3. Step 3: Cross multiply
    139,580.64x = 209,368.26 × 39,741.48
  4. Step 4: Simplify right side
    139,580.64x = 8,320,604,517.42
  5. Step 5: Solve for x
    x = 8,320,604,517.42/139,580.64
  6. Step 6: Final answer
    x = 59,611.45

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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.