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Finding the Fourth Proportional to 72,235.40, 99,712.50 and 43,939.40

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Solution

The fourth proportional to 72,235.40, 99,712.50 and 43,939.40 is: 60,653.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,235.40 : 99,712.50 = 43,939.40 : x
  2. Step 2: Convert to fraction form
    72,235.40/99,712.50 = 43,939.40/x
  3. Step 3: Cross multiply
    72,235.40x = 99,712.50 × 43,939.40
  4. Step 4: Simplify right side
    72,235.40x = 4,381,307,422.50
  5. Step 5: Solve for x
    x = 4,381,307,422.50/72,235.40
  6. Step 6: Final answer
    x = 60,653.19

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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.