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Finding the Fourth Proportional to 189,137.76, 261,005.10 and 104,255.16

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Solution

The fourth proportional to 189,137.76, 261,005.10 and 104,255.16 is: 143,869.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,137.76 : 261,005.10 = 104,255.16 : x
  2. Step 2: Convert to fraction form
    189,137.76/261,005.10 = 104,255.16/x
  3. Step 3: Cross multiply
    189,137.76x = 261,005.10 × 104,255.16
  4. Step 4: Simplify right side
    189,137.76x = 27,211,128,461.32
  5. Step 5: Solve for x
    x = 27,211,128,461.32/189,137.76
  6. Step 6: Final answer
    x = 143,869.36

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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.