Home / 142,006.41-195,969.51-78,344.19

Finding the Fourth Proportional to 142,006.41, 195,969.51 and 78,344.19

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Solution

The fourth proportional to 142,006.41, 195,969.51 and 78,344.19 is: 108,115.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,006.41 : 195,969.51 = 78,344.19 : x
  2. Step 2: Convert to fraction form
    142,006.41/195,969.51 = 78,344.19/x
  3. Step 3: Cross multiply
    142,006.41x = 195,969.51 × 78,344.19
  4. Step 4: Simplify right side
    142,006.41x = 15,353,072,525.65
  5. Step 5: Solve for x
    x = 15,353,072,525.65/142,006.41
  6. Step 6: Final answer
    x = 108,115.35

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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.