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Finding the Fourth Proportional to 66,390.95, 99,615.86 and 34,793.50

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Solution

The fourth proportional to 66,390.95, 99,615.86 and 34,793.50 is: 52,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.95 : 99,615.86 = 34,793.50 : x
  2. Step 2: Convert to fraction form
    66,390.95/99,615.86 = 34,793.50/x
  3. Step 3: Cross multiply
    66,390.95x = 99,615.86 × 34,793.50
  4. Step 4: Simplify right side
    66,390.95x = 3,465,984,001.90
  5. Step 5: Solve for x
    x = 3,465,984,001.90/66,390.95
  6. Step 6: Final answer
    x = 52,205.67

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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.