Home / 86,919.10-130,378.65-84,975.10

Finding the Fourth Proportional to 86,919.10, 130,378.65 and 84,975.10

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Solution

The fourth proportional to 86,919.10, 130,378.65 and 84,975.10 is: 127,462.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,919.10 : 130,378.65 = 84,975.10 : x
  2. Step 2: Convert to fraction form
    86,919.10/130,378.65 = 84,975.10/x
  3. Step 3: Cross multiply
    86,919.10x = 130,378.65 × 84,975.10
  4. Step 4: Simplify right side
    86,919.10x = 11,078,938,821.62
  5. Step 5: Solve for x
    x = 11,078,938,821.62/86,919.10
  6. Step 6: Final answer
    x = 127,462.65

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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.