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Finding the Fourth Proportional to 71,147.80, 106,721.70 and 70,629.40

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Solution

The fourth proportional to 71,147.80, 106,721.70 and 70,629.40 is: 105,944.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,147.80 : 106,721.70 = 70,629.40 : x
  2. Step 2: Convert to fraction form
    71,147.80/106,721.70 = 70,629.40/x
  3. Step 3: Cross multiply
    71,147.80x = 106,721.70 × 70,629.40
  4. Step 4: Simplify right side
    71,147.80x = 7,537,689,637.98
  5. Step 5: Solve for x
    x = 7,537,689,637.98/71,147.80
  6. Step 6: Final answer
    x = 105,944.10

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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.