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Finding the Fourth Proportional to 162,009.80, 243,014.70 and 87,360.20

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Solution

The fourth proportional to 162,009.80, 243,014.70 and 87,360.20 is: 131,040.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,009.80 : 243,014.70 = 87,360.20 : x
  2. Step 2: Convert to fraction form
    162,009.80/243,014.70 = 87,360.20/x
  3. Step 3: Cross multiply
    162,009.80x = 243,014.70 × 87,360.20
  4. Step 4: Simplify right side
    162,009.80x = 21,229,812,794.94
  5. Step 5: Solve for x
    x = 21,229,812,794.94/162,009.80
  6. Step 6: Final answer
    x = 131,040.30

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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.