Home / 191,979.60-287,969.40-107,998.80

Finding the Fourth Proportional to 191,979.60, 287,969.40 and 107,998.80

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Solution

The fourth proportional to 191,979.60, 287,969.40 and 107,998.80 is: 161,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,979.60 : 287,969.40 = 107,998.80 : x
  2. Step 2: Convert to fraction form
    191,979.60/287,969.40 = 107,998.80/x
  3. Step 3: Cross multiply
    191,979.60x = 287,969.40 × 107,998.80
  4. Step 4: Simplify right side
    191,979.60x = 31,100,349,636.72
  5. Step 5: Solve for x
    x = 31,100,349,636.72/191,979.60
  6. Step 6: Final answer
    x = 161,998.20

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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.