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Finding the Fourth Proportional to 85,885.86, 118,567.11 and 66,722.88

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Solution

The fourth proportional to 85,885.86, 118,567.11 and 66,722.88 is: 92,112.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,885.86 : 118,567.11 = 66,722.88 : x
  2. Step 2: Convert to fraction form
    85,885.86/118,567.11 = 66,722.88/x
  3. Step 3: Cross multiply
    85,885.86x = 118,567.11 × 66,722.88
  4. Step 4: Simplify right side
    85,885.86x = 7,911,139,052.48
  5. Step 5: Solve for x
    x = 7,911,139,052.48/85,885.86
  6. Step 6: Final answer
    x = 92,112.24

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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.