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Finding the Fourth Proportional to 85,869.72, 118,555.02 and 69,991.92

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Solution

The fourth proportional to 85,869.72, 118,555.02 and 69,991.92 is: 96,633.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.72 : 118,555.02 = 69,991.92 : x
  2. Step 2: Convert to fraction form
    85,869.72/118,555.02 = 69,991.92/x
  3. Step 3: Cross multiply
    85,869.72x = 118,555.02 × 69,991.92
  4. Step 4: Simplify right side
    85,869.72x = 8,297,893,475.44
  5. Step 5: Solve for x
    x = 8,297,893,475.44/85,869.72
  6. Step 6: Final answer
    x = 96,633.52

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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.