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Finding the Fourth Proportional to 156,989.60, 235,479.15 and 68,243.12

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Solution

The fourth proportional to 156,989.60, 235,479.15 and 68,243.12 is: 102,362.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.60 : 235,479.15 = 68,243.12 : x
  2. Step 2: Convert to fraction form
    156,989.60/235,479.15 = 68,243.12/x
  3. Step 3: Cross multiply
    156,989.60x = 235,479.15 × 68,243.12
  4. Step 4: Simplify right side
    156,989.60x = 16,069,831,890.95
  5. Step 5: Solve for x
    x = 16,069,831,890.95/156,989.60
  6. Step 6: Final answer
    x = 102,362.40

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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.