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Finding the Fourth Proportional to 72,477.70, 100,015.84 and 40,211.98

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Solution

The fourth proportional to 72,477.70, 100,015.84 and 40,211.98 is: 55,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,477.70 : 100,015.84 = 40,211.98 : x
  2. Step 2: Convert to fraction form
    72,477.70/100,015.84 = 40,211.98/x
  3. Step 3: Cross multiply
    72,477.70x = 100,015.84 × 40,211.98
  4. Step 4: Simplify right side
    72,477.70x = 4,021,834,607.19
  5. Step 5: Solve for x
    x = 4,021,834,607.19/72,477.70
  6. Step 6: Final answer
    x = 55,490.65

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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.