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Finding the Fourth Proportional to 156,762.72, 234,619.20 and 128,681.64

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Solution

The fourth proportional to 156,762.72, 234,619.20 and 128,681.64 is: 192,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,762.72 : 234,619.20 = 128,681.64 : x
  2. Step 2: Convert to fraction form
    156,762.72/234,619.20 = 128,681.64/x
  3. Step 3: Cross multiply
    156,762.72x = 234,619.20 × 128,681.64
  4. Step 4: Simplify right side
    156,762.72x = 30,191,183,431.49
  5. Step 5: Solve for x
    x = 30,191,183,431.49/156,762.72
  6. Step 6: Final answer
    x = 192,591.60

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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.