Home / 142,015.20-195,990.48-81,605.52

Finding the Fourth Proportional to 142,015.20, 195,990.48 and 81,605.52

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Solution

The fourth proportional to 142,015.20, 195,990.48 and 81,605.52 is: 112,621.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,015.20 : 195,990.48 = 81,605.52 : x
  2. Step 2: Convert to fraction form
    142,015.20/195,990.48 = 81,605.52/x
  3. Step 3: Cross multiply
    142,015.20x = 195,990.48 × 81,605.52
  4. Step 4: Simplify right side
    142,015.20x = 15,993,905,035.45
  5. Step 5: Solve for x
    x = 15,993,905,035.45/142,015.20
  6. Step 6: Final answer
    x = 112,621.08

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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.