Home / 103,785.25-155,678.03-28,905.61

Finding the Fourth Proportional to 103,785.25, 155,678.03 and 28,905.61

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Solution

The fourth proportional to 103,785.25, 155,678.03 and 28,905.61 is: 43,358.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,785.25 : 155,678.03 = 28,905.61 : x
  2. Step 2: Convert to fraction form
    103,785.25/155,678.03 = 28,905.61/x
  3. Step 3: Cross multiply
    103,785.25x = 155,678.03 × 28,905.61
  4. Step 4: Simplify right side
    103,785.25x = 4,499,968,276.22
  5. Step 5: Solve for x
    x = 4,499,968,276.22/103,785.25
  6. Step 6: Final answer
    x = 43,358.46

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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.