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Finding the Fourth Proportional to 188,502.72, 260,127.16 and 103,619.18

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Solution

The fourth proportional to 188,502.72, 260,127.16 and 103,619.18 is: 142,990.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,502.72 : 260,127.16 = 103,619.18 : x
  2. Step 2: Convert to fraction form
    188,502.72/260,127.16 = 103,619.18/x
  3. Step 3: Cross multiply
    188,502.72x = 260,127.16 × 103,619.18
  4. Step 4: Simplify right side
    188,502.72x = 26,954,161,455.25
  5. Step 5: Solve for x
    x = 26,954,161,455.25/188,502.72
  6. Step 6: Final answer
    x = 142,990.84

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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.