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Finding the Fourth Proportional to 208,819.16, 312,825.51 and 124,646.39

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Solution

The fourth proportional to 208,819.16, 312,825.51 and 124,646.39 is: 186,728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,819.16 : 312,825.51 = 124,646.39 : x
  2. Step 2: Convert to fraction form
    208,819.16/312,825.51 = 124,646.39/x
  3. Step 3: Cross multiply
    208,819.16x = 312,825.51 × 124,646.39
  4. Step 4: Simplify right side
    208,819.16x = 38,992,570,521.41
  5. Step 5: Solve for x
    x = 38,992,570,521.41/208,819.16
  6. Step 6: Final answer
    x = 186,728.89

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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.