Home / 158,138.64-218,228.04-86,518.48

Finding the Fourth Proportional to 158,138.64, 218,228.04 and 86,518.48

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Solution

The fourth proportional to 158,138.64, 218,228.04 and 86,518.48 is: 119,393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,138.64 : 218,228.04 = 86,518.48 : x
  2. Step 2: Convert to fraction form
    158,138.64/218,228.04 = 86,518.48/x
  3. Step 3: Cross multiply
    158,138.64x = 218,228.04 × 86,518.48
  4. Step 4: Simplify right side
    158,138.64x = 18,880,758,314.18
  5. Step 5: Solve for x
    x = 18,880,758,314.18/158,138.64
  6. Step 6: Final answer
    x = 119,393.71

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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.