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Finding the Fourth Proportional to 50,787, 70,086.06 and 30,915

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Solution

The fourth proportional to 50,787, 70,086.06 and 30,915 is: 42,662.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,787 : 70,086.06 = 30,915 : x
  2. Step 2: Convert to fraction form
    50,787/70,086.06 = 30,915/x
  3. Step 3: Cross multiply
    50,787x = 70,086.06 × 30,915
  4. Step 4: Simplify right side
    50,787x = 2,166,710,544.90
  5. Step 5: Solve for x
    x = 2,166,710,544.90/50,787
  6. Step 6: Final answer
    x = 42,662.70

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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.