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Finding the Fourth Proportional to 245,087.16, 338,194.20 and 137,669.01

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Solution

The fourth proportional to 245,087.16, 338,194.20 and 137,669.01 is: 189,968.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,087.16 : 338,194.20 = 137,669.01 : x
  2. Step 2: Convert to fraction form
    245,087.16/338,194.20 = 137,669.01/x
  3. Step 3: Cross multiply
    245,087.16x = 338,194.20 × 137,669.01
  4. Step 4: Simplify right side
    245,087.16x = 46,558,860,701.74
  5. Step 5: Solve for x
    x = 46,558,860,701.74/245,087.16
  6. Step 6: Final answer
    x = 189,968.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.