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Finding the Fourth Proportional to 139,573.54, 209,328.87 and 39,731.53

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Solution

The fourth proportional to 139,573.54, 209,328.87 and 39,731.53 is: 59,588.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,573.54 : 209,328.87 = 39,731.53 : x
  2. Step 2: Convert to fraction form
    139,573.54/209,328.87 = 39,731.53/x
  3. Step 3: Cross multiply
    139,573.54x = 209,328.87 × 39,731.53
  4. Step 4: Simplify right side
    139,573.54x = 8,316,956,278.27
  5. Step 5: Solve for x
    x = 8,316,956,278.27/139,573.54
  6. Step 6: Final answer
    x = 59,588.35

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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.