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Finding the Fourth Proportional to 72,415.95, 99,994.87 and 54,479.85

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Solution

The fourth proportional to 72,415.95, 99,994.87 and 54,479.85 is: 75,227.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.95 : 99,994.87 = 54,479.85 : x
  2. Step 2: Convert to fraction form
    72,415.95/99,994.87 = 54,479.85/x
  3. Step 3: Cross multiply
    72,415.95x = 99,994.87 × 54,479.85
  4. Step 4: Simplify right side
    72,415.95x = 5,447,705,518.37
  5. Step 5: Solve for x
    x = 5,447,705,518.37/72,415.95
  6. Step 6: Final answer
    x = 75,227.98

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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.