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Finding the Fourth Proportional to 72,335.90, 99,779.37 and 47,806.67

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Solution

The fourth proportional to 72,335.90, 99,779.37 and 47,806.67 is: 65,944.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,335.90 : 99,779.37 = 47,806.67 : x
  2. Step 2: Convert to fraction form
    72,335.90/99,779.37 = 47,806.67/x
  3. Step 3: Cross multiply
    72,335.90x = 99,779.37 × 47,806.67
  4. Step 4: Simplify right side
    72,335.90x = 4,770,119,414.40
  5. Step 5: Solve for x
    x = 4,770,119,414.40/72,335.90
  6. Step 6: Final answer
    x = 65,944.01

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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.