Home / 215,878.10-323,841.45-66,117.20

Finding the Fourth Proportional to 215,878.10, 323,841.45 and 66,117.20

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Solution

The fourth proportional to 215,878.10, 323,841.45 and 66,117.20 is: 99,183.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,878.10 : 323,841.45 = 66,117.20 : x
  2. Step 2: Convert to fraction form
    215,878.10/323,841.45 = 66,117.20/x
  3. Step 3: Cross multiply
    215,878.10x = 323,841.45 × 66,117.20
  4. Step 4: Simplify right side
    215,878.10x = 21,411,489,917.94
  5. Step 5: Solve for x
    x = 21,411,489,917.94/215,878.10
  6. Step 6: Final answer
    x = 99,183.24

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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.