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Finding the Fourth Proportional to 72,495.45, 100,124.78 and 49,903.74

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Solution

The fourth proportional to 72,495.45, 100,124.78 and 49,903.74 is: 68,922.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,495.45 : 100,124.78 = 49,903.74 : x
  2. Step 2: Convert to fraction form
    72,495.45/100,124.78 = 49,903.74/x
  3. Step 3: Cross multiply
    72,495.45x = 100,124.78 × 49,903.74
  4. Step 4: Simplify right side
    72,495.45x = 4,996,600,739.16
  5. Step 5: Solve for x
    x = 4,996,600,739.16/72,495.45
  6. Step 6: Final answer
    x = 68,922.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.