Home / 190,680.66-286,007.08-78,330.36

Finding the Fourth Proportional to 190,680.66, 286,007.08 and 78,330.36

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Solution

The fourth proportional to 190,680.66, 286,007.08 and 78,330.36 is: 117,489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,680.66 : 286,007.08 = 78,330.36 : x
  2. Step 2: Convert to fraction form
    190,680.66/286,007.08 = 78,330.36/x
  3. Step 3: Cross multiply
    190,680.66x = 286,007.08 × 78,330.36
  4. Step 4: Simplify right side
    190,680.66x = 22,403,037,538.95
  5. Step 5: Solve for x
    x = 22,403,037,538.95/190,680.66
  6. Step 6: Final answer
    x = 117,489.83

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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.