Home / 70,346.02-105,529.42-20,419.64

Finding the Fourth Proportional to 70,346.02, 105,529.42 and 20,419.64

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Solution

The fourth proportional to 70,346.02, 105,529.42 and 20,419.64 is: 30,632.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,346.02 : 105,529.42 = 20,419.64 : x
  2. Step 2: Convert to fraction form
    70,346.02/105,529.42 = 20,419.64/x
  3. Step 3: Cross multiply
    70,346.02x = 105,529.42 × 20,419.64
  4. Step 4: Simplify right side
    70,346.02x = 2,154,872,765.81
  5. Step 5: Solve for x
    x = 2,154,872,765.81/70,346.02
  6. Step 6: Final answer
    x = 30,632.48

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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.