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Finding the Fourth Proportional to 158,477.64, 218,697.30 and 85,879.08

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Solution

The fourth proportional to 158,477.64, 218,697.30 and 85,879.08 is: 118,512.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,477.64 : 218,697.30 = 85,879.08 : x
  2. Step 2: Convert to fraction form
    158,477.64/218,697.30 = 85,879.08/x
  3. Step 3: Cross multiply
    158,477.64x = 218,697.30 × 85,879.08
  4. Step 4: Simplify right side
    158,477.64x = 18,781,522,922.48
  5. Step 5: Solve for x
    x = 18,781,522,922.48/158,477.64
  6. Step 6: Final answer
    x = 118,512.13

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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.