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Finding the Fourth Proportional to 72,409.68, 99,938.88 and 42,201.36

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Solution

The fourth proportional to 72,409.68, 99,938.88 and 42,201.36 is: 58,245.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,409.68 : 99,938.88 = 42,201.36 : x
  2. Step 2: Convert to fraction form
    72,409.68/99,938.88 = 42,201.36/x
  3. Step 3: Cross multiply
    72,409.68x = 99,938.88 × 42,201.36
  4. Step 4: Simplify right side
    72,409.68x = 4,217,556,652.88
  5. Step 5: Solve for x
    x = 4,217,556,652.88/72,409.68
  6. Step 6: Final answer
    x = 58,245.76

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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.