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Finding the Fourth Proportional to 66,208.40, 99,053.40 and 42,880.40

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Solution

The fourth proportional to 66,208.40, 99,053.40 and 42,880.40 is: 64,152.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,208.40 : 99,053.40 = 42,880.40 : x
  2. Step 2: Convert to fraction form
    66,208.40/99,053.40 = 42,880.40/x
  3. Step 3: Cross multiply
    66,208.40x = 99,053.40 × 42,880.40
  4. Step 4: Simplify right side
    66,208.40x = 4,247,449,413.36
  5. Step 5: Solve for x
    x = 4,247,449,413.36/66,208.40
  6. Step 6: Final answer
    x = 64,152.73

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Why These Related Problems?

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