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Finding the Fourth Proportional to 50,638.79, 69,880.70 and 27,978.74

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Solution

The fourth proportional to 50,638.79, 69,880.70 and 27,978.74 is: 38,610.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,638.79 : 69,880.70 = 27,978.74 : x
  2. Step 2: Convert to fraction form
    50,638.79/69,880.70 = 27,978.74/x
  3. Step 3: Cross multiply
    50,638.79x = 69,880.70 × 27,978.74
  4. Step 4: Simplify right side
    50,638.79x = 1,955,173,447.02
  5. Step 5: Solve for x
    x = 1,955,173,447.02/50,638.79
  6. Step 6: Final answer
    x = 38,610.20

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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.