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Finding the Fourth Proportional to 66,390.90, 99,604.08 and 28,953.99

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Solution

The fourth proportional to 66,390.90, 99,604.08 and 28,953.99 is: 43,438.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.90 : 99,604.08 = 28,953.99 : x
  2. Step 2: Convert to fraction form
    66,390.90/99,604.08 = 28,953.99/x
  3. Step 3: Cross multiply
    66,390.90x = 99,604.08 × 28,953.99
  4. Step 4: Simplify right side
    66,390.90x = 2,883,935,536.28
  5. Step 5: Solve for x
    x = 2,883,935,536.28/66,390.90
  6. Step 6: Final answer
    x = 43,438.72

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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.