Home / 72,310.42-100,389.45-70,145.29

Finding the Fourth Proportional to 72,310.42, 100,389.45 and 70,145.29

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Solution

The fourth proportional to 72,310.42, 100,389.45 and 70,145.29 is: 97,383.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,310.42 : 100,389.45 = 70,145.29 : x
  2. Step 2: Convert to fraction form
    72,310.42/100,389.45 = 70,145.29/x
  3. Step 3: Cross multiply
    72,310.42x = 100,389.45 × 70,145.29
  4. Step 4: Simplify right side
    72,310.42x = 7,041,847,274.44
  5. Step 5: Solve for x
    x = 7,041,847,274.44/72,310.42
  6. Step 6: Final answer
    x = 97,383.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.