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Finding the Fourth Proportional to 72,907.74, 100,612.35 and 40,641.93

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Solution

The fourth proportional to 72,907.74, 100,612.35 and 40,641.93 is: 56,085.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.74 : 100,612.35 = 40,641.93 : x
  2. Step 2: Convert to fraction form
    72,907.74/100,612.35 = 40,641.93/x
  3. Step 3: Cross multiply
    72,907.74x = 100,612.35 × 40,641.93
  4. Step 4: Simplify right side
    72,907.74x = 4,089,080,085.84
  5. Step 5: Solve for x
    x = 4,089,080,085.84/72,907.74
  6. Step 6: Final answer
    x = 56,085.68

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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.