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Finding the Fourth Proportional to 158,361.08, 218,539.01 and 86,740.88

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Solution

The fourth proportional to 158,361.08, 218,539.01 and 86,740.88 is: 119,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,361.08 : 218,539.01 = 86,740.88 : x
  2. Step 2: Convert to fraction form
    158,361.08/218,539.01 = 86,740.88/x
  3. Step 3: Cross multiply
    158,361.08x = 218,539.01 × 86,740.88
  4. Step 4: Simplify right side
    158,361.08x = 18,956,265,165.89
  5. Step 5: Solve for x
    x = 18,956,265,165.89/158,361.08
  6. Step 6: Final answer
    x = 119,702.81

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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.