Home / 72,149.50-99,564.38-40,318.66

Finding the Fourth Proportional to 72,149.50, 99,564.38 and 40,318.66

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Solution

The fourth proportional to 72,149.50, 99,564.38 and 40,318.66 is: 55,638.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,149.50 : 99,564.38 = 40,318.66 : x
  2. Step 2: Convert to fraction form
    72,149.50/99,564.38 = 40,318.66/x
  3. Step 3: Cross multiply
    72,149.50x = 99,564.38 × 40,318.66
  4. Step 4: Simplify right side
    72,149.50x = 4,014,302,385.33
  5. Step 5: Solve for x
    x = 4,014,302,385.33/72,149.50
  6. Step 6: Final answer
    x = 55,638.67

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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.