Home / 190,815.12-286,222.68-78,490.80

Finding the Fourth Proportional to 190,815.12, 286,222.68 and 78,490.80

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Solution

The fourth proportional to 190,815.12, 286,222.68 and 78,490.80 is: 117,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,815.12 : 286,222.68 = 78,490.80 : x
  2. Step 2: Convert to fraction form
    190,815.12/286,222.68 = 78,490.80/x
  3. Step 3: Cross multiply
    190,815.12x = 286,222.68 × 78,490.80
  4. Step 4: Simplify right side
    190,815.12x = 22,465,847,131.34
  5. Step 5: Solve for x
    x = 22,465,847,131.34/190,815.12
  6. Step 6: Final answer
    x = 117,736.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.