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Finding the Fourth Proportional to 135,390.96, 186,860.16 and 84,411.96

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Solution

The fourth proportional to 135,390.96, 186,860.16 and 84,411.96 is: 116,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,390.96 : 186,860.16 = 84,411.96 : x
  2. Step 2: Convert to fraction form
    135,390.96/186,860.16 = 84,411.96/x
  3. Step 3: Cross multiply
    135,390.96x = 186,860.16 × 84,411.96
  4. Step 4: Simplify right side
    135,390.96x = 15,773,232,351.51
  5. Step 5: Solve for x
    x = 15,773,232,351.51/135,390.96
  6. Step 6: Final answer
    x = 116,501.37

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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.