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Finding the Fourth Proportional to 161,970.88, 243,026.49 and 87,003.56

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Solution

The fourth proportional to 161,970.88, 243,026.49 and 87,003.56 is: 130,543.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,970.88 : 243,026.49 = 87,003.56 : x
  2. Step 2: Convert to fraction form
    161,970.88/243,026.49 = 87,003.56/x
  3. Step 3: Cross multiply
    161,970.88x = 243,026.49 × 87,003.56
  4. Step 4: Simplify right side
    161,970.88x = 21,144,169,804.30
  5. Step 5: Solve for x
    x = 21,144,169,804.30/161,970.88
  6. Step 6: Final answer
    x = 130,543.03

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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.