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Finding the Fourth Proportional to 72,615.19, 100,208.33 and 40,783.41

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Solution

The fourth proportional to 72,615.19, 100,208.33 and 40,783.41 is: 56,280.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.19 : 100,208.33 = 40,783.41 : x
  2. Step 2: Convert to fraction form
    72,615.19/100,208.33 = 40,783.41/x
  3. Step 3: Cross multiply
    72,615.19x = 100,208.33 × 40,783.41
  4. Step 4: Simplify right side
    72,615.19x = 4,086,837,407.81
  5. Step 5: Solve for x
    x = 4,086,837,407.81/72,615.19
  6. Step 6: Final answer
    x = 56,280.75

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1.5x scale

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.