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Finding the Fourth Proportional to 70,328.92, 105,493.38 and 21,080.92

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Solution

The fourth proportional to 70,328.92, 105,493.38 and 21,080.92 is: 31,621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,328.92 : 105,493.38 = 21,080.92 : x
  2. Step 2: Convert to fraction form
    70,328.92/105,493.38 = 21,080.92/x
  3. Step 3: Cross multiply
    70,328.92x = 105,493.38 × 21,080.92
  4. Step 4: Simplify right side
    70,328.92x = 2,223,897,820.75
  5. Step 5: Solve for x
    x = 2,223,897,820.75/70,328.92
  6. Step 6: Final answer
    x = 31,621.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.