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Finding the Fourth Proportional to 139,461.12, 209,025.63 and 72,883.44

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Solution

The fourth proportional to 139,461.12, 209,025.63 and 72,883.44 is: 109,238.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,461.12 : 209,025.63 = 72,883.44 : x
  2. Step 2: Convert to fraction form
    139,461.12/209,025.63 = 72,883.44/x
  3. Step 3: Cross multiply
    139,461.12x = 209,025.63 × 72,883.44
  4. Step 4: Simplify right side
    139,461.12x = 15,234,506,962.57
  5. Step 5: Solve for x
    x = 15,234,506,962.57/139,461.12
  6. Step 6: Final answer
    x = 109,238.38

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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.