Home / 208,258.90-312,323.65-75,121.86

Finding the Fourth Proportional to 208,258.90, 312,323.65 and 75,121.86

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Solution

The fourth proportional to 208,258.90, 312,323.65 and 75,121.86 is: 112,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,258.90 : 312,323.65 = 75,121.86 : x
  2. Step 2: Convert to fraction form
    208,258.90/312,323.65 = 75,121.86/x
  3. Step 3: Cross multiply
    208,258.90x = 312,323.65 × 75,121.86
  4. Step 4: Simplify right side
    208,258.90x = 23,462,331,858.17
  5. Step 5: Solve for x
    x = 23,462,331,858.17/208,258.90
  6. Step 6: Final answer
    x = 112,659.45

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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.