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Finding the Fourth Proportional to 189,211.64, 261,111.12 and 104,328.71

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Solution

The fourth proportional to 189,211.64, 261,111.12 and 104,328.71 is: 143,973.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,211.64 : 261,111.12 = 104,328.71 : x
  2. Step 2: Convert to fraction form
    189,211.64/261,111.12 = 104,328.71/x
  3. Step 3: Cross multiply
    189,211.64x = 261,111.12 × 104,328.71
  4. Step 4: Simplify right side
    189,211.64x = 27,241,384,619.47
  5. Step 5: Solve for x
    x = 27,241,384,619.47/189,211.64
  6. Step 6: Final answer
    x = 143,973.09

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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.