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Finding the Fourth Proportional to 93,358.58, 139,912.80 and 87,379.88

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Solution

The fourth proportional to 93,358.58, 139,912.80 and 87,379.88 is: 130,952.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,358.58 : 139,912.80 = 87,379.88 : x
  2. Step 2: Convert to fraction form
    93,358.58/139,912.80 = 87,379.88/x
  3. Step 3: Cross multiply
    93,358.58x = 139,912.80 × 87,379.88
  4. Step 4: Simplify right side
    93,358.58x = 12,225,563,674.46
  5. Step 5: Solve for x
    x = 12,225,563,674.46/93,358.58
  6. Step 6: Final answer
    x = 130,952.76

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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.