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Finding the Fourth Proportional to 139,080.60, 208,718.10 and 60,251.40

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Solution

The fourth proportional to 139,080.60, 208,718.10 and 60,251.40 is: 90,419.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,080.60 : 208,718.10 = 60,251.40 : x
  2. Step 2: Convert to fraction form
    139,080.60/208,718.10 = 60,251.40/x
  3. Step 3: Cross multiply
    139,080.60x = 208,718.10 × 60,251.40
  4. Step 4: Simplify right side
    139,080.60x = 12,575,557,730.34
  5. Step 5: Solve for x
    x = 12,575,557,730.34/139,080.60
  6. Step 6: Final answer
    x = 90,419.21

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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.