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Finding the Fourth Proportional to 136,561.40, 188,347.88 and 88,829.98

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Solution

The fourth proportional to 136,561.40, 188,347.88 and 88,829.98 is: 122,515.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,561.40 : 188,347.88 = 88,829.98 : x
  2. Step 2: Convert to fraction form
    136,561.40/188,347.88 = 88,829.98/x
  3. Step 3: Cross multiply
    136,561.40x = 188,347.88 × 88,829.98
  4. Step 4: Simplify right side
    136,561.40x = 16,730,938,413.44
  5. Step 5: Solve for x
    x = 16,730,938,413.44/136,561.40
  6. Step 6: Final answer
    x = 122,515.87

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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.