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Finding the Fourth Proportional to 66,060.80, 99,091.20 and 16,812.80

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Solution

The fourth proportional to 66,060.80, 99,091.20 and 16,812.80 is: 25,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,060.80 : 99,091.20 = 16,812.80 : x
  2. Step 2: Convert to fraction form
    66,060.80/99,091.20 = 16,812.80/x
  3. Step 3: Cross multiply
    66,060.80x = 99,091.20 × 16,812.80
  4. Step 4: Simplify right side
    66,060.80x = 1,666,000,527.36
  5. Step 5: Solve for x
    x = 1,666,000,527.36/66,060.80
  6. Step 6: Final answer
    x = 25,219.20

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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.