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Finding the Fourth Proportional to 72,357.80, 108,536.70 and 40,735.40

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Solution

The fourth proportional to 72,357.80, 108,536.70 and 40,735.40 is: 61,103.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,357.80 : 108,536.70 = 40,735.40 : x
  2. Step 2: Convert to fraction form
    72,357.80/108,536.70 = 40,735.40/x
  3. Step 3: Cross multiply
    72,357.80x = 108,536.70 × 40,735.40
  4. Step 4: Simplify right side
    72,357.80x = 4,421,285,889.18
  5. Step 5: Solve for x
    x = 4,421,285,889.18/72,357.80
  6. Step 6: Final answer
    x = 61,103.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.