Home / 142,051.20-196,040.16-81,641.40

Finding the Fourth Proportional to 142,051.20, 196,040.16 and 81,641.40

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Solution

The fourth proportional to 142,051.20, 196,040.16 and 81,641.40 is: 112,670.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,051.20 : 196,040.16 = 81,641.40 : x
  2. Step 2: Convert to fraction form
    142,051.20/196,040.16 = 81,641.40/x
  3. Step 3: Cross multiply
    142,051.20x = 196,040.16 × 81,641.40
  4. Step 4: Simplify right side
    142,051.20x = 16,004,993,118.62
  5. Step 5: Solve for x
    x = 16,004,993,118.62/142,051.20
  6. Step 6: Final answer
    x = 112,670.59

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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.