Home / 191,921.10-287,881.65-107,940.30

Finding the Fourth Proportional to 191,921.10, 287,881.65 and 107,940.30

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Solution

The fourth proportional to 191,921.10, 287,881.65 and 107,940.30 is: 161,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,921.10 : 287,881.65 = 107,940.30 : x
  2. Step 2: Convert to fraction form
    191,921.10/287,881.65 = 107,940.30/x
  3. Step 3: Cross multiply
    191,921.10x = 287,881.65 × 107,940.30
  4. Step 4: Simplify right side
    191,921.10x = 31,074,031,665.50
  5. Step 5: Solve for x
    x = 31,074,031,665.50/191,921.10
  6. Step 6: Final answer
    x = 161,910.45

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Similar ratio
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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.