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Finding the Fourth Proportional to 66,519.70, 99,779.55 and 63,895.30

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Solution

The fourth proportional to 66,519.70, 99,779.55 and 63,895.30 is: 95,842.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,519.70 : 99,779.55 = 63,895.30 : x
  2. Step 2: Convert to fraction form
    66,519.70/99,779.55 = 63,895.30/x
  3. Step 3: Cross multiply
    66,519.70x = 99,779.55 × 63,895.30
  4. Step 4: Simplify right side
    66,519.70x = 6,375,444,281.12
  5. Step 5: Solve for x
    x = 6,375,444,281.12/66,519.70
  6. Step 6: Final answer
    x = 95,842.95

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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.