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Finding the Fourth Proportional to 151,810.91, 209,505.79 and 87,301.09

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Solution

The fourth proportional to 151,810.91, 209,505.79 and 87,301.09 is: 120,479.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,810.91 : 209,505.79 = 87,301.09 : x
  2. Step 2: Convert to fraction form
    151,810.91/209,505.79 = 87,301.09/x
  3. Step 3: Cross multiply
    151,810.91x = 209,505.79 × 87,301.09
  4. Step 4: Simplify right side
    151,810.91x = 18,290,084,199.32
  5. Step 5: Solve for x
    x = 18,290,084,199.32/151,810.91
  6. Step 6: Final answer
    x = 120,479.38

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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.