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Finding the Fourth Proportional to 72,375.42, 99,860.70 and 55,398.84

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Solution

The fourth proportional to 72,375.42, 99,860.70 and 55,398.84 is: 76,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.42 : 99,860.70 = 55,398.84 : x
  2. Step 2: Convert to fraction form
    72,375.42/99,860.70 = 55,398.84/x
  3. Step 3: Cross multiply
    72,375.42x = 99,860.70 × 55,398.84
  4. Step 4: Simplify right side
    72,375.42x = 5,532,166,463.24
  5. Step 5: Solve for x
    x = 5,532,166,463.24/72,375.42
  6. Step 6: Final answer
    x = 76,437.09

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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.