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Finding the Fourth Proportional to 156,912.60, 235,368.90 and 96,988.80

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Solution

The fourth proportional to 156,912.60, 235,368.90 and 96,988.80 is: 145,483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,912.60 : 235,368.90 = 96,988.80 : x
  2. Step 2: Convert to fraction form
    156,912.60/235,368.90 = 96,988.80/x
  3. Step 3: Cross multiply
    156,912.60x = 235,368.90 × 96,988.80
  4. Step 4: Simplify right side
    156,912.60x = 22,828,147,168.32
  5. Step 5: Solve for x
    x = 22,828,147,168.32/156,912.60
  6. Step 6: Final answer
    x = 145,483.20

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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.