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Finding the Fourth Proportional to 66,800.40, 100,216.80 and 47,117.40

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Solution

The fourth proportional to 66,800.40, 100,216.80 and 47,117.40 is: 70,687.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,800.40 : 100,216.80 = 47,117.40 : x
  2. Step 2: Convert to fraction form
    66,800.40/100,216.80 = 47,117.40/x
  3. Step 3: Cross multiply
    66,800.40x = 100,216.80 × 47,117.40
  4. Step 4: Simplify right side
    66,800.40x = 4,721,955,052.32
  5. Step 5: Solve for x
    x = 4,721,955,052.32/66,800.40
  6. Step 6: Final answer
    x = 70,687.53

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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.