Home / 86,919.40-130,379.10-55,815.40

Finding the Fourth Proportional to 86,919.40, 130,379.10 and 55,815.40

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Solution

The fourth proportional to 86,919.40, 130,379.10 and 55,815.40 is: 83,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,919.40 : 130,379.10 = 55,815.40 : x
  2. Step 2: Convert to fraction form
    86,919.40/130,379.10 = 55,815.40/x
  3. Step 3: Cross multiply
    86,919.40x = 130,379.10 × 55,815.40
  4. Step 4: Simplify right side
    86,919.40x = 7,277,161,618.14
  5. Step 5: Solve for x
    x = 7,277,161,618.14/86,919.40
  6. Step 6: Final answer
    x = 83,723.10

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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.