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Finding the Fourth Proportional to 65,706.88, 90,643.79 and 43,035.90

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Solution

The fourth proportional to 65,706.88, 90,643.79 and 43,035.90 is: 59,368.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,706.88 : 90,643.79 = 43,035.90 : x
  2. Step 2: Convert to fraction form
    65,706.88/90,643.79 = 43,035.90/x
  3. Step 3: Cross multiply
    65,706.88x = 90,643.79 × 43,035.90
  4. Step 4: Simplify right side
    65,706.88x = 3,900,936,413.66
  5. Step 5: Solve for x
    x = 3,900,936,413.66/65,706.88
  6. Step 6: Final answer
    x = 59,368.77

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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.