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Finding the Fourth Proportional to 51,403.95, 70,929.95 and 30,190.05

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Solution

The fourth proportional to 51,403.95, 70,929.95 and 30,190.05 is: 41,657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,403.95 : 70,929.95 = 30,190.05 : x
  2. Step 2: Convert to fraction form
    51,403.95/70,929.95 = 30,190.05/x
  3. Step 3: Cross multiply
    51,403.95x = 70,929.95 × 30,190.05
  4. Step 4: Simplify right side
    51,403.95x = 2,141,378,586.05
  5. Step 5: Solve for x
    x = 2,141,378,586.05/51,403.95
  6. Step 6: Final answer
    x = 41,657.86

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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.