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Finding the Fourth Proportional to 72,810.46, 100,480.44 and 40,980.46

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Solution

The fourth proportional to 72,810.46, 100,480.44 and 40,980.46 is: 56,554.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.46 : 100,480.44 = 40,980.46 : x
  2. Step 2: Convert to fraction form
    72,810.46/100,480.44 = 40,980.46/x
  3. Step 3: Cross multiply
    72,810.46x = 100,480.44 × 40,980.46
  4. Step 4: Simplify right side
    72,810.46x = 4,117,734,652.20
  5. Step 5: Solve for x
    x = 4,117,734,652.20/72,810.46
  6. Step 6: Final answer
    x = 56,554.16

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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.