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Finding the Fourth Proportional to 42,278.81, 63,413.17 and 11,116.49

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Solution

The fourth proportional to 42,278.81, 63,413.17 and 11,116.49 is: 16,673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,278.81 : 63,413.17 = 11,116.49 : x
  2. Step 2: Convert to fraction form
    42,278.81/63,413.17 = 11,116.49/x
  3. Step 3: Cross multiply
    42,278.81x = 63,413.17 × 11,116.49
  4. Step 4: Simplify right side
    42,278.81x = 704,931,525.32
  5. Step 5: Solve for x
    x = 704,931,525.32/42,278.81
  6. Step 6: Final answer
    x = 16,673.40

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.