Home / 142,662.30-196,871.67-78,999.90

Finding the Fourth Proportional to 142,662.30, 196,871.67 and 78,999.90

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Solution

The fourth proportional to 142,662.30, 196,871.67 and 78,999.90 is: 109,018.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,662.30 : 196,871.67 = 78,999.90 : x
  2. Step 2: Convert to fraction form
    142,662.30/196,871.67 = 78,999.90/x
  3. Step 3: Cross multiply
    142,662.30x = 196,871.67 × 78,999.90
  4. Step 4: Simplify right side
    142,662.30x = 15,552,842,242.83
  5. Step 5: Solve for x
    x = 15,552,842,242.83/142,662.30
  6. Step 6: Final answer
    x = 109,018.59

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1.5x scale

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.