Home / 72,683.40-109,038.06-20,091.72

Finding the Fourth Proportional to 72,683.40, 109,038.06 and 20,091.72

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Solution

The fourth proportional to 72,683.40, 109,038.06 and 20,091.72 is: 30,141.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,683.40 : 109,038.06 = 20,091.72 : x
  2. Step 2: Convert to fraction form
    72,683.40/109,038.06 = 20,091.72/x
  3. Step 3: Cross multiply
    72,683.40x = 109,038.06 × 20,091.72
  4. Step 4: Simplify right side
    72,683.40x = 2,190,762,170.86
  5. Step 5: Solve for x
    x = 2,190,762,170.86/72,683.40
  6. Step 6: Final answer
    x = 30,141.16

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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.