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Finding the Fourth Proportional to 118,790.81, 163,935.40 and 65,075.82

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Solution

The fourth proportional to 118,790.81, 163,935.40 and 65,075.82 is: 89,806.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,790.81 : 163,935.40 = 65,075.82 : x
  2. Step 2: Convert to fraction form
    118,790.81/163,935.40 = 65,075.82/x
  3. Step 3: Cross multiply
    118,790.81x = 163,935.40 × 65,075.82
  4. Step 4: Simplify right side
    118,790.81x = 10,668,230,582.03
  5. Step 5: Solve for x
    x = 10,668,230,582.03/118,790.81
  6. Step 6: Final answer
    x = 89,806.87

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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.