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Finding the Fourth Proportional to 70,230.48, 105,330.12 and 20,299.68

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Solution

The fourth proportional to 70,230.48, 105,330.12 and 20,299.68 is: 30,445.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,230.48 : 105,330.12 = 20,299.68 : x
  2. Step 2: Convert to fraction form
    70,230.48/105,330.12 = 20,299.68/x
  3. Step 3: Cross multiply
    70,230.48x = 105,330.12 × 20,299.68
  4. Step 4: Simplify right side
    70,230.48x = 2,138,167,730.36
  5. Step 5: Solve for x
    x = 2,138,167,730.36/70,230.48
  6. Step 6: Final answer
    x = 30,445.01

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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.