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Finding the Fourth Proportional to 92,975.04, 128,324.32 and 55,242

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Solution

The fourth proportional to 92,975.04, 128,324.32 and 55,242 is: 76,245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,975.04 : 128,324.32 = 55,242 : x
  2. Step 2: Convert to fraction form
    92,975.04/128,324.32 = 55,242/x
  3. Step 3: Cross multiply
    92,975.04x = 128,324.32 × 55,242
  4. Step 4: Simplify right side
    92,975.04x = 7,088,892,085.44
  5. Step 5: Solve for x
    x = 7,088,892,085.44/92,975.04
  6. Step 6: Final answer
    x = 76,245.11

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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.