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Finding the Fourth Proportional to 208,382.60, 312,113.10 and 83,659.40

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Solution

The fourth proportional to 208,382.60, 312,113.10 and 83,659.40 is: 125,304.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,382.60 : 312,113.10 = 83,659.40 : x
  2. Step 2: Convert to fraction form
    208,382.60/312,113.10 = 83,659.40/x
  3. Step 3: Cross multiply
    208,382.60x = 312,113.10 × 83,659.40
  4. Step 4: Simplify right side
    208,382.60x = 26,111,194,678.14
  5. Step 5: Solve for x
    x = 26,111,194,678.14/208,382.60
  6. Step 6: Final answer
    x = 125,304.10

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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.