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Finding the Fourth Proportional to 218,708.40, 328,075.56 and 68,953.44

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Solution

The fourth proportional to 218,708.40, 328,075.56 and 68,953.44 is: 103,434.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,708.40 : 328,075.56 = 68,953.44 : x
  2. Step 2: Convert to fraction form
    218,708.40/328,075.56 = 68,953.44/x
  3. Step 3: Cross multiply
    218,708.40x = 328,075.56 × 68,953.44
  4. Step 4: Simplify right side
    218,708.40x = 22,621,938,441.93
  5. Step 5: Solve for x
    x = 22,621,938,441.93/218,708.40
  6. Step 6: Final answer
    x = 103,434.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.