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Finding the Fourth Proportional to 72,698.79, 100,313.46 and 40,861.62

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Solution

The fourth proportional to 72,698.79, 100,313.46 and 40,861.62 is: 56,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,698.79 : 100,313.46 = 40,861.62 : x
  2. Step 2: Convert to fraction form
    72,698.79/100,313.46 = 40,861.62/x
  3. Step 3: Cross multiply
    72,698.79x = 100,313.46 × 40,861.62
  4. Step 4: Simplify right side
    72,698.79x = 4,098,970,483.41
  5. Step 5: Solve for x
    x = 4,098,970,483.41/72,698.79
  6. Step 6: Final answer
    x = 56,382.93

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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.