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Finding the Fourth Proportional to 53,459.80, 80,208.02 and 20,189.45

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Solution

The fourth proportional to 53,459.80, 80,208.02 and 20,189.45 is: 30,291.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,459.80 : 80,208.02 = 20,189.45 : x
  2. Step 2: Convert to fraction form
    53,459.80/80,208.02 = 20,189.45/x
  3. Step 3: Cross multiply
    53,459.80x = 80,208.02 × 20,189.45
  4. Step 4: Simplify right side
    53,459.80x = 1,619,356,060.38
  5. Step 5: Solve for x
    x = 1,619,356,060.38/53,459.80
  6. Step 6: Final answer
    x = 30,291.10

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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.