Home / 72,638.07-100,229.63-40,800.87

Finding the Fourth Proportional to 72,638.07, 100,229.63 and 40,800.87

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Solution

The fourth proportional to 72,638.07, 100,229.63 and 40,800.87 is: 56,299.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638.07 : 100,229.63 = 40,800.87 : x
  2. Step 2: Convert to fraction form
    72,638.07/100,229.63 = 40,800.87/x
  3. Step 3: Cross multiply
    72,638.07x = 100,229.63 × 40,800.87
  4. Step 4: Simplify right side
    72,638.07x = 4,089,455,899.77
  5. Step 5: Solve for x
    x = 4,089,455,899.77/72,638.07
  6. Step 6: Final answer
    x = 56,299.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.