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Finding the Fourth Proportional to 72,638.60, 100,248.98 and 43,973.91

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Solution

The fourth proportional to 72,638.60, 100,248.98 and 43,973.91 is: 60,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638.60 : 100,248.98 = 43,973.91 : x
  2. Step 2: Convert to fraction form
    72,638.60/100,248.98 = 43,973.91/x
  3. Step 3: Cross multiply
    72,638.60x = 100,248.98 × 43,973.91
  4. Step 4: Simplify right side
    72,638.60x = 4,408,339,404.24
  5. Step 5: Solve for x
    x = 4,408,339,404.24/72,638.60
  6. Step 6: Final answer
    x = 60,688.67

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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.