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Finding the Fourth Proportional to 99,413.88, 137,194.94 and 56,980.60

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Solution

The fourth proportional to 99,413.88, 137,194.94 and 56,980.60 is: 78,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,413.88 : 137,194.94 = 56,980.60 : x
  2. Step 2: Convert to fraction form
    99,413.88/137,194.94 = 56,980.60/x
  3. Step 3: Cross multiply
    99,413.88x = 137,194.94 × 56,980.60
  4. Step 4: Simplify right side
    99,413.88x = 7,817,449,998.16
  5. Step 5: Solve for x
    x = 7,817,449,998.16/99,413.88
  6. Step 6: Final answer
    x = 78,635.40

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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.