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Finding the Fourth Proportional to 208,235.61, 287,347.77 and 122,185.80

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Solution

The fourth proportional to 208,235.61, 287,347.77 and 122,185.80 is: 168,606.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,235.61 : 287,347.77 = 122,185.80 : x
  2. Step 2: Convert to fraction form
    208,235.61/287,347.77 = 122,185.80/x
  3. Step 3: Cross multiply
    208,235.61x = 287,347.77 × 122,185.80
  4. Step 4: Simplify right side
    208,235.61x = 35,109,817,155.67
  5. Step 5: Solve for x
    x = 35,109,817,155.67/208,235.61
  6. Step 6: Final answer
    x = 168,606.21

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1.5x scale

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.