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Finding the Fourth Proportional to 156,672.80, 235,009.20 and 139,614.20

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Solution

The fourth proportional to 156,672.80, 235,009.20 and 139,614.20 is: 209,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,672.80 : 235,009.20 = 139,614.20 : x
  2. Step 2: Convert to fraction form
    156,672.80/235,009.20 = 139,614.20/x
  3. Step 3: Cross multiply
    156,672.80x = 235,009.20 × 139,614.20
  4. Step 4: Simplify right side
    156,672.80x = 32,810,621,450.64
  5. Step 5: Solve for x
    x = 32,810,621,450.64/156,672.80
  6. Step 6: Final answer
    x = 209,421.30

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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.