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Finding the Fourth Proportional to 85,677.85, 118,024.17 and 72,890.07

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Solution

The fourth proportional to 85,677.85, 118,024.17 and 72,890.07 is: 100,408.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,677.85 : 118,024.17 = 72,890.07 : x
  2. Step 2: Convert to fraction form
    85,677.85/118,024.17 = 72,890.07/x
  3. Step 3: Cross multiply
    85,677.85x = 118,024.17 × 72,890.07
  4. Step 4: Simplify right side
    85,677.85x = 8,602,789,739.65
  5. Step 5: Solve for x
    x = 8,602,789,739.65/85,677.85
  6. Step 6: Final answer
    x = 100,408.57

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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.