Home / 142,203.81-196,224.46-78,537.81

Finding the Fourth Proportional to 142,203.81, 196,224.46 and 78,537.81

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Solution

The fourth proportional to 142,203.81, 196,224.46 and 78,537.81 is: 108,372.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,203.81 : 196,224.46 = 78,537.81 : x
  2. Step 2: Convert to fraction form
    142,203.81/196,224.46 = 78,537.81/x
  3. Step 3: Cross multiply
    142,203.81x = 196,224.46 × 78,537.81
  4. Step 4: Simplify right side
    142,203.81x = 15,411,039,356.83
  5. Step 5: Solve for x
    x = 15,411,039,356.83/142,203.81
  6. Step 6: Final answer
    x = 108,372.90

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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.