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Finding the Fourth Proportional to 62,980.28, 86,912.34 and 34,685.80

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Solution

The fourth proportional to 62,980.28, 86,912.34 and 34,685.80 is: 47,866.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,980.28 : 86,912.34 = 34,685.80 : x
  2. Step 2: Convert to fraction form
    62,980.28/86,912.34 = 34,685.80/x
  3. Step 3: Cross multiply
    62,980.28x = 86,912.34 × 34,685.80
  4. Step 4: Simplify right side
    62,980.28x = 3,014,624,042.77
  5. Step 5: Solve for x
    x = 3,014,624,042.77/62,980.28
  6. Step 6: Final answer
    x = 47,866.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.