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Finding the Fourth Proportional to 143,314.52, 197,792.70 and 86,726.84

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Solution

The fourth proportional to 143,314.52, 197,792.70 and 86,726.84 is: 119,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,314.52 : 197,792.70 = 86,726.84 : x
  2. Step 2: Convert to fraction form
    143,314.52/197,792.70 = 86,726.84/x
  3. Step 3: Cross multiply
    143,314.52x = 197,792.70 × 86,726.84
  4. Step 4: Simplify right side
    143,314.52x = 17,153,935,846.07
  5. Step 5: Solve for x
    x = 17,153,935,846.07/143,314.52
  6. Step 6: Final answer
    x = 119,694.33

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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.