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Finding the Fourth Proportional to 50,776.78, 70,071.90 and 28,420.78

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Solution

The fourth proportional to 50,776.78, 70,071.90 and 28,420.78 is: 39,220.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,776.78 : 70,071.90 = 28,420.78 : x
  2. Step 2: Convert to fraction form
    50,776.78/70,071.90 = 28,420.78/x
  3. Step 3: Cross multiply
    50,776.78x = 70,071.90 × 28,420.78
  4. Step 4: Simplify right side
    50,776.78x = 1,991,498,054.08
  5. Step 5: Solve for x
    x = 1,991,498,054.08/50,776.78
  6. Step 6: Final answer
    x = 39,220.64

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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.