Home / 100,931.10-151,420.26-30,810.38

Finding the Fourth Proportional to 100,931.10, 151,420.26 and 30,810.38

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Solution

The fourth proportional to 100,931.10, 151,420.26 and 30,810.38 is: 46,222.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,931.10 : 151,420.26 = 30,810.38 : x
  2. Step 2: Convert to fraction form
    100,931.10/151,420.26 = 30,810.38/x
  3. Step 3: Cross multiply
    100,931.10x = 151,420.26 × 30,810.38
  4. Step 4: Simplify right side
    100,931.10x = 4,665,315,750.30
  5. Step 5: Solve for x
    x = 4,665,315,750.30/100,931.10
  6. Step 6: Final answer
    x = 46,222.78

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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.