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Finding the Fourth Proportional to 243,779.91, 365,604.35 and 85,987.59

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Solution

The fourth proportional to 243,779.91, 365,604.35 and 85,987.59 is: 128,958.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,779.91 : 365,604.35 = 85,987.59 : x
  2. Step 2: Convert to fraction form
    243,779.91/365,604.35 = 85,987.59/x
  3. Step 3: Cross multiply
    243,779.91x = 365,604.35 × 85,987.59
  4. Step 4: Simplify right side
    243,779.91x = 31,437,436,520.08
  5. Step 5: Solve for x
    x = 31,437,436,520.08/243,779.91
  6. Step 6: Final answer
    x = 128,958.27

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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.