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Finding the Fourth Proportional to 72,758.01, 109,135.98 and 39,688.68

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Solution

The fourth proportional to 72,758.01, 109,135.98 and 39,688.68 is: 59,532.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,758.01 : 109,135.98 = 39,688.68 : x
  2. Step 2: Convert to fraction form
    72,758.01/109,135.98 = 39,688.68/x
  3. Step 3: Cross multiply
    72,758.01x = 109,135.98 × 39,688.68
  4. Step 4: Simplify right side
    72,758.01x = 4,331,462,986.71
  5. Step 5: Solve for x
    x = 4,331,462,986.71/72,758.01
  6. Step 6: Final answer
    x = 59,532.46

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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.