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Finding the Fourth Proportional to 188,647.09, 260,331.72 and 106,990.88

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Solution

The fourth proportional to 188,647.09, 260,331.72 and 106,990.88 is: 147,646.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,647.09 : 260,331.72 = 106,990.88 : x
  2. Step 2: Convert to fraction form
    188,647.09/260,331.72 = 106,990.88/x
  3. Step 3: Cross multiply
    188,647.09x = 260,331.72 × 106,990.88
  4. Step 4: Simplify right side
    188,647.09x = 27,853,119,814.71
  5. Step 5: Solve for x
    x = 27,853,119,814.71/188,647.09
  6. Step 6: Final answer
    x = 147,646.70

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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.