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Finding the Fourth Proportional to 66,458.70, 99,742.45 and 65,940.30

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Solution

The fourth proportional to 66,458.70, 99,742.45 and 65,940.30 is: 98,964.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.70 : 99,742.45 = 65,940.30 : x
  2. Step 2: Convert to fraction form
    66,458.70/99,742.45 = 65,940.30/x
  3. Step 3: Cross multiply
    66,458.70x = 99,742.45 × 65,940.30
  4. Step 4: Simplify right side
    66,458.70x = 6,577,047,075.74
  5. Step 5: Solve for x
    x = 6,577,047,075.74/66,458.70
  6. Step 6: Final answer
    x = 98,964.43

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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.