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Finding the Fourth Proportional to 66,959.15, 100,435.84 and 20,210.63

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Solution

The fourth proportional to 66,959.15, 100,435.84 and 20,210.63 is: 30,315.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,959.15 : 100,435.84 = 20,210.63 : x
  2. Step 2: Convert to fraction form
    66,959.15/100,435.84 = 20,210.63/x
  3. Step 3: Cross multiply
    66,959.15x = 100,435.84 × 20,210.63
  4. Step 4: Simplify right side
    66,959.15x = 2,029,871,048.27
  5. Step 5: Solve for x
    x = 2,029,871,048.27/66,959.15
  6. Step 6: Final answer
    x = 30,315.07

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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.