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Finding the Fourth Proportional to 272,574.45, 408,861.68 and 139,410.45

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Solution

The fourth proportional to 272,574.45, 408,861.68 and 139,410.45 is: 209,115.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,574.45 : 408,861.68 = 139,410.45 : x
  2. Step 2: Convert to fraction form
    272,574.45/408,861.68 = 139,410.45/x
  3. Step 3: Cross multiply
    272,574.45x = 408,861.68 × 139,410.45
  4. Step 4: Simplify right side
    272,574.45x = 56,999,590,099.50
  5. Step 5: Solve for x
    x = 56,999,590,099.50/272,574.45
  6. Step 6: Final answer
    x = 209,115.68

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1.5x scale

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.