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Finding the Fourth Proportional to 208,674.50, 287,970.81 and 119,250.50

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Solution

The fourth proportional to 208,674.50, 287,970.81 and 119,250.50 is: 164,565.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,674.50 : 287,970.81 = 119,250.50 : x
  2. Step 2: Convert to fraction form
    208,674.50/287,970.81 = 119,250.50/x
  3. Step 3: Cross multiply
    208,674.50x = 287,970.81 × 119,250.50
  4. Step 4: Simplify right side
    208,674.50x = 34,340,663,077.91
  5. Step 5: Solve for x
    x = 34,340,663,077.91/208,674.50
  6. Step 6: Final answer
    x = 164,565.69

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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.