Home / 142,650.22-196,857.28-78,988

Finding the Fourth Proportional to 142,650.22, 196,857.28 and 78,988

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Solution

The fourth proportional to 142,650.22, 196,857.28 and 78,988 is: 109,003.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,650.22 : 196,857.28 = 78,988 : x
  2. Step 2: Convert to fraction form
    142,650.22/196,857.28 = 78,988/x
  3. Step 3: Cross multiply
    142,650.22x = 196,857.28 × 78,988
  4. Step 4: Simplify right side
    142,650.22x = 15,549,362,832.64
  5. Step 5: Solve for x
    x = 15,549,362,832.64/142,650.22
  6. Step 6: Final answer
    x = 109,003.43

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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.