Home / 142,058.21-196,039.64-78,399.90

Finding the Fourth Proportional to 142,058.21, 196,039.64 and 78,399.90

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Solution

The fourth proportional to 142,058.21, 196,039.64 and 78,399.90 is: 108,191.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,058.21 : 196,039.64 = 78,399.90 : x
  2. Step 2: Convert to fraction form
    142,058.21/196,039.64 = 78,399.90/x
  3. Step 3: Cross multiply
    142,058.21x = 196,039.64 × 78,399.90
  4. Step 4: Simplify right side
    142,058.21x = 15,369,488,368.04
  5. Step 5: Solve for x
    x = 15,369,488,368.04/142,058.21
  6. Step 6: Final answer
    x = 108,191.49

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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.