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Finding the Fourth Proportional to 118,790.40, 163,934.84 and 65,075.41

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Solution

The fourth proportional to 118,790.40, 163,934.84 and 65,075.41 is: 89,806.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,790.40 : 163,934.84 = 65,075.41 : x
  2. Step 2: Convert to fraction form
    118,790.40/163,934.84 = 65,075.41/x
  3. Step 3: Cross multiply
    118,790.40x = 163,934.84 × 65,075.41
  4. Step 4: Simplify right side
    118,790.40x = 10,668,126,926.28
  5. Step 5: Solve for x
    x = 10,668,126,926.28/118,790.40
  6. Step 6: Final answer
    x = 89,806.31

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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.