Home / 190,977.40-286,379.70-85,742.20

Finding the Fourth Proportional to 190,977.40, 286,379.70 and 85,742.20

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Solution

The fourth proportional to 190,977.40, 286,379.70 and 85,742.20 is: 128,574.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,977.40 : 286,379.70 = 85,742.20 : x
  2. Step 2: Convert to fraction form
    190,977.40/286,379.70 = 85,742.20/x
  3. Step 3: Cross multiply
    190,977.40x = 286,379.70 × 85,742.20
  4. Step 4: Simplify right side
    190,977.40x = 24,554,825,513.34
  5. Step 5: Solve for x
    x = 24,554,825,513.34/190,977.40
  6. Step 6: Final answer
    x = 128,574.51

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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.