Home / 86,621.30-130,029.15-66,986.90

Finding the Fourth Proportional to 86,621.30, 130,029.15 and 66,986.90

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Solution

The fourth proportional to 86,621.30, 130,029.15 and 66,986.90 is: 100,555.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,621.30 : 130,029.15 = 66,986.90 : x
  2. Step 2: Convert to fraction form
    86,621.30/130,029.15 = 66,986.90/x
  3. Step 3: Cross multiply
    86,621.30x = 130,029.15 × 66,986.90
  4. Step 4: Simplify right side
    86,621.30x = 8,710,249,668.14
  5. Step 5: Solve for x
    x = 8,710,249,668.14/86,621.30
  6. Step 6: Final answer
    x = 100,555.52

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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.