Home / 190,920.16-286,270.50-78,677.86

Finding the Fourth Proportional to 190,920.16, 286,270.50 and 78,677.86

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Solution

The fourth proportional to 190,920.16, 286,270.50 and 78,677.86 is: 117,971.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,920.16 : 286,270.50 = 78,677.86 : x
  2. Step 2: Convert to fraction form
    190,920.16/286,270.50 = 78,677.86/x
  3. Step 3: Cross multiply
    190,920.16x = 286,270.50 × 78,677.86
  4. Step 4: Simplify right side
    190,920.16x = 22,523,150,321.13
  5. Step 5: Solve for x
    x = 22,523,150,321.13/190,920.16
  6. Step 6: Final answer
    x = 117,971.57

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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.