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Finding the Fourth Proportional to 103,544.58, 155,089.20 and 85,571.54

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Solution

The fourth proportional to 103,544.58, 155,089.20 and 85,571.54 is: 128,169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,544.58 : 155,089.20 = 85,571.54 : x
  2. Step 2: Convert to fraction form
    103,544.58/155,089.20 = 85,571.54/x
  3. Step 3: Cross multiply
    103,544.58x = 155,089.20 × 85,571.54
  4. Step 4: Simplify right side
    103,544.58x = 13,271,221,681.37
  5. Step 5: Solve for x
    x = 13,271,221,681.37/103,544.58
  6. Step 6: Final answer
    x = 128,169.16

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1.5x scale

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.