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Finding the Fourth Proportional to 208,724, 288,039.12 and 119,301.92

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Solution

The fourth proportional to 208,724, 288,039.12 and 119,301.92 is: 164,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,724 : 288,039.12 = 119,301.92 : x
  2. Step 2: Convert to fraction form
    208,724/288,039.12 = 119,301.92/x
  3. Step 3: Cross multiply
    208,724x = 288,039.12 × 119,301.92
  4. Step 4: Simplify right side
    208,724x = 34,363,620,051.11
  5. Step 5: Solve for x
    x = 34,363,620,051.11/208,724
  6. Step 6: Final answer
    x = 164,636.65

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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.