Home / 70,421.27-105,649.18-20,501.81

Finding the Fourth Proportional to 70,421.27, 105,649.18 and 20,501.81

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Solution

The fourth proportional to 70,421.27, 105,649.18 and 20,501.81 is: 30,757.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,421.27 : 105,649.18 = 20,501.81 : x
  2. Step 2: Convert to fraction form
    70,421.27/105,649.18 = 20,501.81/x
  3. Step 3: Cross multiply
    70,421.27x = 105,649.18 × 20,501.81
  4. Step 4: Simplify right side
    70,421.27x = 2,165,999,415.02
  5. Step 5: Solve for x
    x = 2,165,999,415.02/70,421.27
  6. Step 6: Final answer
    x = 30,757.74

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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.