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Finding the Fourth Proportional to 123,525.54, 170,465.70 and 71,855.03

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Solution

The fourth proportional to 123,525.54, 170,465.70 and 71,855.03 is: 99,160.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,525.54 : 170,465.70 = 71,855.03 : x
  2. Step 2: Convert to fraction form
    123,525.54/170,465.70 = 71,855.03/x
  3. Step 3: Cross multiply
    123,525.54x = 170,465.70 × 71,855.03
  4. Step 4: Simplify right side
    123,525.54x = 12,248,817,987.47
  5. Step 5: Solve for x
    x = 12,248,817,987.47/123,525.54
  6. Step 6: Final answer
    x = 99,160.21

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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.