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Finding the Fourth Proportional to 139,877.01, 209,701.31 and 65,043.95

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Solution

The fourth proportional to 139,877.01, 209,701.31 and 65,043.95 is: 97,512.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,877.01 : 209,701.31 = 65,043.95 : x
  2. Step 2: Convert to fraction form
    139,877.01/209,701.31 = 65,043.95/x
  3. Step 3: Cross multiply
    139,877.01x = 209,701.31 × 65,043.95
  4. Step 4: Simplify right side
    139,877.01x = 13,639,800,148.85
  5. Step 5: Solve for x
    x = 13,639,800,148.85/139,877.01
  6. Step 6: Final answer
    x = 97,512.81

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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.