Home / 66,438.20-99,607.70-40,137.40

Finding the Fourth Proportional to 66,438.20, 99,607.70 and 40,137.40

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Solution

The fourth proportional to 66,438.20, 99,607.70 and 40,137.40 is: 60,176.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.20 : 99,607.70 = 40,137.40 : x
  2. Step 2: Convert to fraction form
    66,438.20/99,607.70 = 40,137.40/x
  3. Step 3: Cross multiply
    66,438.20x = 99,607.70 × 40,137.40
  4. Step 4: Simplify right side
    66,438.20x = 3,997,994,097.98
  5. Step 5: Solve for x
    x = 3,997,994,097.98/66,438.20
  6. Step 6: Final answer
    x = 60,176.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.