Home / 70,239.42-105,343.28-20,308.38

Finding the Fourth Proportional to 70,239.42, 105,343.28 and 20,308.38

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Solution

The fourth proportional to 70,239.42, 105,343.28 and 20,308.38 is: 30,457.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,239.42 : 105,343.28 = 20,308.38 : x
  2. Step 2: Convert to fraction form
    70,239.42/105,343.28 = 20,308.38/x
  3. Step 3: Cross multiply
    70,239.42x = 105,343.28 × 20,308.38
  4. Step 4: Simplify right side
    70,239.42x = 2,139,351,360.69
  5. Step 5: Solve for x
    x = 2,139,351,360.69/70,239.42
  6. Step 6: Final answer
    x = 30,457.99

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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.