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Finding the Fourth Proportional to 66,510.30, 99,765.45 and 19,763.18

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Solution

The fourth proportional to 66,510.30, 99,765.45 and 19,763.18 is: 29,644.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,510.30 : 99,765.45 = 19,763.18 : x
  2. Step 2: Convert to fraction form
    66,510.30/99,765.45 = 19,763.18/x
  3. Step 3: Cross multiply
    66,510.30x = 99,765.45 × 19,763.18
  4. Step 4: Simplify right side
    66,510.30x = 1,971,682,047.30
  5. Step 5: Solve for x
    x = 1,971,682,047.30/66,510.30
  6. Step 6: Final answer
    x = 29,644.76

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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.