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Finding the Fourth Proportional to 53,200.80, 79,801.20 and 39,981.60

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Solution

The fourth proportional to 53,200.80, 79,801.20 and 39,981.60 is: 59,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,200.80 : 79,801.20 = 39,981.60 : x
  2. Step 2: Convert to fraction form
    53,200.80/79,801.20 = 39,981.60/x
  3. Step 3: Cross multiply
    53,200.80x = 79,801.20 × 39,981.60
  4. Step 4: Simplify right side
    53,200.80x = 3,190,579,657.92
  5. Step 5: Solve for x
    x = 3,190,579,657.92/53,200.80
  6. Step 6: Final answer
    x = 59,972.40

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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.