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Finding the Fourth Proportional to 139,599.76, 209,195.52 and 86,848.96

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Solution

The fourth proportional to 139,599.76, 209,195.52 and 86,848.96 is: 130,146.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,599.76 : 209,195.52 = 86,848.96 : x
  2. Step 2: Convert to fraction form
    139,599.76/209,195.52 = 86,848.96/x
  3. Step 3: Cross multiply
    139,599.76x = 209,195.52 × 86,848.96
  4. Step 4: Simplify right side
    139,599.76x = 18,168,413,348.66
  5. Step 5: Solve for x
    x = 18,168,413,348.66/139,599.76
  6. Step 6: Final answer
    x = 130,146.45

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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.