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Finding the Fourth Proportional to 93,257.80, 139,886.70 and 80,573.20

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Solution

The fourth proportional to 93,257.80, 139,886.70 and 80,573.20 is: 120,859.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,257.80 : 139,886.70 = 80,573.20 : x
  2. Step 2: Convert to fraction form
    93,257.80/139,886.70 = 80,573.20/x
  3. Step 3: Cross multiply
    93,257.80x = 139,886.70 × 80,573.20
  4. Step 4: Simplify right side
    93,257.80x = 11,271,119,056.44
  5. Step 5: Solve for x
    x = 11,271,119,056.44/93,257.80
  6. Step 6: Final answer
    x = 120,859.80

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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.