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Finding the Fourth Proportional to 70,158.52, 105,213.03 and 20,225.16

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Solution

The fourth proportional to 70,158.52, 105,213.03 and 20,225.16 is: 30,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,158.52 : 105,213.03 = 20,225.16 : x
  2. Step 2: Convert to fraction form
    70,158.52/105,213.03 = 20,225.16/x
  3. Step 3: Cross multiply
    70,158.52x = 105,213.03 × 20,225.16
  4. Step 4: Simplify right side
    70,158.52x = 2,127,950,289.99
  5. Step 5: Solve for x
    x = 2,127,950,289.99/70,158.52
  6. Step 6: Final answer
    x = 30,330.60

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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.