Home / 134,921.81-186,208.50-78,333.19

Finding the Fourth Proportional to 134,921.81, 186,208.50 and 78,333.19

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Solution

The fourth proportional to 134,921.81, 186,208.50 and 78,333.19 is: 108,109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,921.81 : 186,208.50 = 78,333.19 : x
  2. Step 2: Convert to fraction form
    134,921.81/186,208.50 = 78,333.19/x
  3. Step 3: Cross multiply
    134,921.81x = 186,208.50 × 78,333.19
  4. Step 4: Simplify right side
    134,921.81x = 14,586,305,638.34
  5. Step 5: Solve for x
    x = 14,586,305,638.34/134,921.81
  6. Step 6: Final answer
    x = 108,109.32

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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.