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Finding the Fourth Proportional to 104,245.84, 143,855.72 and 61,779.20

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Solution

The fourth proportional to 104,245.84, 143,855.72 and 61,779.20 is: 85,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,245.84 : 143,855.72 = 61,779.20 : x
  2. Step 2: Convert to fraction form
    104,245.84/143,855.72 = 61,779.20/x
  3. Step 3: Cross multiply
    104,245.84x = 143,855.72 × 61,779.20
  4. Step 4: Simplify right side
    104,245.84x = 8,887,291,297.02
  5. Step 5: Solve for x
    x = 8,887,291,297.02/104,245.84
  6. Step 6: Final answer
    x = 85,253.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.