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Finding the Fourth Proportional to 70,616.40, 105,927.80 and 20,019.04

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Solution

The fourth proportional to 70,616.40, 105,927.80 and 20,019.04 is: 30,029.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,616.40 : 105,927.80 = 20,019.04 : x
  2. Step 2: Convert to fraction form
    70,616.40/105,927.80 = 20,019.04/x
  3. Step 3: Cross multiply
    70,616.40x = 105,927.80 × 20,019.04
  4. Step 4: Simplify right side
    70,616.40x = 2,120,572,500.40
  5. Step 5: Solve for x
    x = 2,120,572,500.40/70,616.40
  6. Step 6: Final answer
    x = 30,029.46

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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.