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Finding the Fourth Proportional to 85,603.65, 128,395.76 and 33,008.73

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Solution

The fourth proportional to 85,603.65, 128,395.76 and 33,008.73 is: 49,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.65 : 128,395.76 = 33,008.73 : x
  2. Step 2: Convert to fraction form
    85,603.65/128,395.76 = 33,008.73/x
  3. Step 3: Cross multiply
    85,603.65x = 128,395.76 × 33,008.73
  4. Step 4: Simplify right side
    85,603.65x = 4,238,180,809.94
  5. Step 5: Solve for x
    x = 4,238,180,809.94/85,603.65
  6. Step 6: Final answer
    x = 49,509.35

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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.