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Finding the Fourth Proportional to 72,477.05, 100,018.15 and 40,216.57

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Solution

The fourth proportional to 72,477.05, 100,018.15 and 40,216.57 is: 55,498.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,477.05 : 100,018.15 = 40,216.57 : x
  2. Step 2: Convert to fraction form
    72,477.05/100,018.15 = 40,216.57/x
  3. Step 3: Cross multiply
    72,477.05x = 100,018.15 × 40,216.57
  4. Step 4: Simplify right side
    72,477.05x = 4,022,386,806.38
  5. Step 5: Solve for x
    x = 4,022,386,806.38/72,477.05
  6. Step 6: Final answer
    x = 55,498.77

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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.