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Finding the Fourth Proportional to 139,648.51, 209,068.83 and 125,226.60

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Solution

The fourth proportional to 139,648.51, 209,068.83 and 125,226.60 is: 187,477.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,648.51 : 209,068.83 = 125,226.60 : x
  2. Step 2: Convert to fraction form
    139,648.51/209,068.83 = 125,226.60/x
  3. Step 3: Cross multiply
    139,648.51x = 209,068.83 × 125,226.60
  4. Step 4: Simplify right side
    139,648.51x = 26,180,978,746.88
  5. Step 5: Solve for x
    x = 26,180,978,746.88/139,648.51
  6. Step 6: Final answer
    x = 187,477.68

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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.