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Finding the Fourth Proportional to 66,746.80, 100,217.40 and 51,972.40

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Solution

The fourth proportional to 66,746.80, 100,217.40 and 51,972.40 is: 78,034.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,746.80 : 100,217.40 = 51,972.40 : x
  2. Step 2: Convert to fraction form
    66,746.80/100,217.40 = 51,972.40/x
  3. Step 3: Cross multiply
    66,746.80x = 100,217.40 × 51,972.40
  4. Step 4: Simplify right side
    66,746.80x = 5,208,538,799.76
  5. Step 5: Solve for x
    x = 5,208,538,799.76/66,746.80
  6. Step 6: Final answer
    x = 78,034.28

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1.5x scale

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.