Home / 142,021.53-196,001.42-81,603.83

Finding the Fourth Proportional to 142,021.53, 196,001.42 and 81,603.83

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Solution

The fourth proportional to 142,021.53, 196,001.42 and 81,603.83 is: 112,620.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,021.53 : 196,001.42 = 81,603.83 : x
  2. Step 2: Convert to fraction form
    142,021.53/196,001.42 = 81,603.83/x
  3. Step 3: Cross multiply
    142,021.53x = 196,001.42 × 81,603.83
  4. Step 4: Simplify right side
    142,021.53x = 15,994,465,169.41
  5. Step 5: Solve for x
    x = 15,994,465,169.41/142,021.53
  6. Step 6: Final answer
    x = 112,620.00

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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.