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Finding the Fourth Proportional to 50,739.69, 70,019.05 and 28,079.64

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Solution

The fourth proportional to 50,739.69, 70,019.05 and 28,079.64 is: 38,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,739.69 : 70,019.05 = 28,079.64 : x
  2. Step 2: Convert to fraction form
    50,739.69/70,019.05 = 28,079.64/x
  3. Step 3: Cross multiply
    50,739.69x = 70,019.05 × 28,079.64
  4. Step 4: Simplify right side
    50,739.69x = 1,966,109,699.59
  5. Step 5: Solve for x
    x = 1,966,109,699.59/50,739.69
  6. Step 6: Final answer
    x = 38,748.95

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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.