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Finding the Fourth Proportional to 118,698.37, 163,803.79 and 64,986.79

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Solution

The fourth proportional to 118,698.37, 163,803.79 and 64,986.79 is: 89,681.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.37 : 163,803.79 = 64,986.79 : x
  2. Step 2: Convert to fraction form
    118,698.37/163,803.79 = 64,986.79/x
  3. Step 3: Cross multiply
    118,698.37x = 163,803.79 × 64,986.79
  4. Step 4: Simplify right side
    118,698.37x = 10,645,082,501.93
  5. Step 5: Solve for x
    x = 10,645,082,501.93/118,698.37
  6. Step 6: Final answer
    x = 89,681.79

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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.