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Finding the Fourth Proportional to 189,303.75, 261,242.42 and 122,352.39

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Solution

The fourth proportional to 189,303.75, 261,242.42 and 122,352.39 is: 168,848.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,303.75 : 261,242.42 = 122,352.39 : x
  2. Step 2: Convert to fraction form
    189,303.75/261,242.42 = 122,352.39/x
  3. Step 3: Cross multiply
    189,303.75x = 261,242.42 × 122,352.39
  4. Step 4: Simplify right side
    189,303.75x = 31,963,633,844.62
  5. Step 5: Solve for x
    x = 31,963,633,844.62/189,303.75
  6. Step 6: Final answer
    x = 168,848.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.