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Finding the Fourth Proportional to 158,798.70, 219,144.69 and 87,185.25

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Solution

The fourth proportional to 158,798.70, 219,144.69 and 87,185.25 is: 120,317.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,798.70 : 219,144.69 = 87,185.25 : x
  2. Step 2: Convert to fraction form
    158,798.70/219,144.69 = 87,185.25/x
  3. Step 3: Cross multiply
    158,798.70x = 219,144.69 × 87,185.25
  4. Step 4: Simplify right side
    158,798.70x = 19,106,184,583.82
  5. Step 5: Solve for x
    x = 19,106,184,583.82/158,798.70
  6. Step 6: Final answer
    x = 120,317.01

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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.