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Finding the Fourth Proportional to 151,637.76, 209,243.19 and 87,963.24

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Solution

The fourth proportional to 151,637.76, 209,243.19 and 87,963.24 is: 121,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,637.76 : 209,243.19 = 87,963.24 : x
  2. Step 2: Convert to fraction form
    151,637.76/209,243.19 = 87,963.24/x
  3. Step 3: Cross multiply
    151,637.76x = 209,243.19 × 87,963.24
  4. Step 4: Simplify right side
    151,637.76x = 18,405,708,940.34
  5. Step 5: Solve for x
    x = 18,405,708,940.34/151,637.76
  6. Step 6: Final answer
    x = 121,379.46

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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.