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Finding the Fourth Proportional to 39,801.60, 59,740.80 and 20,102.40

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Solution

The fourth proportional to 39,801.60, 59,740.80 and 20,102.40 is: 30,172.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,801.60 : 59,740.80 = 20,102.40 : x
  2. Step 2: Convert to fraction form
    39,801.60/59,740.80 = 20,102.40/x
  3. Step 3: Cross multiply
    39,801.60x = 59,740.80 × 20,102.40
  4. Step 4: Simplify right side
    39,801.60x = 1,200,933,457.92
  5. Step 5: Solve for x
    x = 1,200,933,457.92/39,801.60
  6. Step 6: Final answer
    x = 30,172.99

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1.5x scale

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.