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Finding the Fourth Proportional to 155,993.97, 215,271.69 and 84,373.98

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Solution

The fourth proportional to 155,993.97, 215,271.69 and 84,373.98 is: 116,436.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,993.97 : 215,271.69 = 84,373.98 : x
  2. Step 2: Convert to fraction form
    155,993.97/215,271.69 = 84,373.98/x
  3. Step 3: Cross multiply
    155,993.97x = 215,271.69 × 84,373.98
  4. Step 4: Simplify right side
    155,993.97x = 18,163,329,266.63
  5. Step 5: Solve for x
    x = 18,163,329,266.63/155,993.97
  6. Step 6: Final answer
    x = 116,436.10

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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.