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Finding the Fourth Proportional to 189,048.76, 260,983.73 and 128,116.84

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Solution

The fourth proportional to 189,048.76, 260,983.73 and 128,116.84 is: 176,866.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,048.76 : 260,983.73 = 128,116.84 : x
  2. Step 2: Convert to fraction form
    189,048.76/260,983.73 = 128,116.84/x
  3. Step 3: Cross multiply
    189,048.76x = 260,983.73 × 128,116.84
  4. Step 4: Simplify right side
    189,048.76x = 33,436,409,474.09
  5. Step 5: Solve for x
    x = 33,436,409,474.09/189,048.76
  6. Step 6: Final answer
    x = 176,866.59

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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.