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Finding the Fourth Proportional to 72,661.34, 100,271.76 and 40,835.63

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Solution

The fourth proportional to 72,661.34, 100,271.76 and 40,835.63 is: 56,352.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,661.34 : 100,271.76 = 40,835.63 : x
  2. Step 2: Convert to fraction form
    72,661.34/100,271.76 = 40,835.63/x
  3. Step 3: Cross multiply
    72,661.34x = 100,271.76 × 40,835.63
  4. Step 4: Simplify right side
    72,661.34x = 4,094,659,989.45
  5. Step 5: Solve for x
    x = 4,094,659,989.45/72,661.34
  6. Step 6: Final answer
    x = 56,352.67

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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.