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Finding the Fourth Proportional to 66,612.30, 99,918.45 and 56,114.70

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Solution

The fourth proportional to 66,612.30, 99,918.45 and 56,114.70 is: 84,172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.30 : 99,918.45 = 56,114.70 : x
  2. Step 2: Convert to fraction form
    66,612.30/99,918.45 = 56,114.70/x
  3. Step 3: Cross multiply
    66,612.30x = 99,918.45 × 56,114.70
  4. Step 4: Simplify right side
    66,612.30x = 5,606,893,846.22
  5. Step 5: Solve for x
    x = 5,606,893,846.22/66,612.30
  6. Step 6: Final answer
    x = 84,172.05

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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.