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Finding the Fourth Proportional to 42,708, 63,981.81 and 39,485.82

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Solution

The fourth proportional to 42,708, 63,981.81 and 39,485.82 is: 59,154.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,708 : 63,981.81 = 39,485.82 : x
  2. Step 2: Convert to fraction form
    42,708/63,981.81 = 39,485.82/x
  3. Step 3: Cross multiply
    42,708x = 63,981.81 × 39,485.82
  4. Step 4: Simplify right side
    42,708x = 2,526,374,232.93
  5. Step 5: Solve for x
    x = 2,526,374,232.93/42,708
  6. Step 6: Final answer
    x = 59,154.59

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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.