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Finding the Fourth Proportional to 207,603.04, 311,412.32 and 72,640.80

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Solution

The fourth proportional to 207,603.04, 311,412.32 and 72,640.80 is: 108,963.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,603.04 : 311,412.32 = 72,640.80 : x
  2. Step 2: Convert to fraction form
    207,603.04/311,412.32 = 72,640.80/x
  3. Step 3: Cross multiply
    207,603.04x = 311,412.32 × 72,640.80
  4. Step 4: Simplify right side
    207,603.04x = 22,621,240,054.66
  5. Step 5: Solve for x
    x = 22,621,240,054.66/207,603.04
  6. Step 6: Final answer
    x = 108,963.92

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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.