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Finding the Fourth Proportional to 139,848.40, 209,772.60 and 86,704.30

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Solution

The fourth proportional to 139,848.40, 209,772.60 and 86,704.30 is: 130,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,848.40 : 209,772.60 = 86,704.30 : x
  2. Step 2: Convert to fraction form
    139,848.40/209,772.60 = 86,704.30/x
  3. Step 3: Cross multiply
    139,848.40x = 209,772.60 × 86,704.30
  4. Step 4: Simplify right side
    139,848.40x = 18,188,186,442.18
  5. Step 5: Solve for x
    x = 18,188,186,442.18/139,848.40
  6. Step 6: Final answer
    x = 130,056.45

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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.