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Finding the Fourth Proportional to 72,885.52, 100,580.64 and 40,619.43

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Solution

The fourth proportional to 72,885.52, 100,580.64 and 40,619.43 is: 56,054.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,885.52 : 100,580.64 = 40,619.43 : x
  2. Step 2: Convert to fraction form
    72,885.52/100,580.64 = 40,619.43/x
  3. Step 3: Cross multiply
    72,885.52x = 100,580.64 × 40,619.43
  4. Step 4: Simplify right side
    72,885.52x = 4,085,528,265.84
  5. Step 5: Solve for x
    x = 4,085,528,265.84/72,885.52
  6. Step 6: Final answer
    x = 56,054.05

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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.