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Finding the Fourth Proportional to 118,698.12, 163,803.44 and 64,986.55

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Solution

The fourth proportional to 118,698.12, 163,803.44 and 64,986.55 is: 89,681.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,698.12 : 163,803.44 = 64,986.55 : x
  2. Step 2: Convert to fraction form
    118,698.12/163,803.44 = 64,986.55/x
  3. Step 3: Cross multiply
    118,698.12x = 163,803.44 × 64,986.55
  4. Step 4: Simplify right side
    118,698.12x = 10,645,020,196.69
  5. Step 5: Solve for x
    x = 10,645,020,196.69/118,698.12
  6. Step 6: Final answer
    x = 89,681.46

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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.