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Finding the Fourth Proportional to 86,685.40, 130,028.10 and 53,297.20

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Solution

The fourth proportional to 86,685.40, 130,028.10 and 53,297.20 is: 79,945.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,685.40 : 130,028.10 = 53,297.20 : x
  2. Step 2: Convert to fraction form
    86,685.40/130,028.10 = 53,297.20/x
  3. Step 3: Cross multiply
    86,685.40x = 130,028.10 × 53,297.20
  4. Step 4: Simplify right side
    86,685.40x = 6,930,133,651.32
  5. Step 5: Solve for x
    x = 6,930,133,651.32/86,685.40
  6. Step 6: Final answer
    x = 79,945.80

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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.