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Finding the Fourth Proportional to 86,564.60, 129,846.90 and 39,908.60

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Solution

The fourth proportional to 86,564.60, 129,846.90 and 39,908.60 is: 59,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,564.60 : 129,846.90 = 39,908.60 : x
  2. Step 2: Convert to fraction form
    86,564.60/129,846.90 = 39,908.60/x
  3. Step 3: Cross multiply
    86,564.60x = 129,846.90 × 39,908.60
  4. Step 4: Simplify right side
    86,564.60x = 5,182,007,993.34
  5. Step 5: Solve for x
    x = 5,182,007,993.34/86,564.60
  6. Step 6: Final answer
    x = 59,862.90

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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.