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Finding the Fourth Proportional to 71,146.80, 106,720.20 and 70,628.40

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Solution

The fourth proportional to 71,146.80, 106,720.20 and 70,628.40 is: 105,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,146.80 : 106,720.20 = 70,628.40 : x
  2. Step 2: Convert to fraction form
    71,146.80/106,720.20 = 70,628.40/x
  3. Step 3: Cross multiply
    71,146.80x = 106,720.20 × 70,628.40
  4. Step 4: Simplify right side
    71,146.80x = 7,537,476,973.68
  5. Step 5: Solve for x
    x = 7,537,476,973.68/71,146.80
  6. Step 6: Final answer
    x = 105,942.60

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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.