Home / 86,278.42-129,448.77-30,126.80

Finding the Fourth Proportional to 86,278.42, 129,448.77 and 30,126.80

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Solution

The fourth proportional to 86,278.42, 129,448.77 and 30,126.80 is: 45,201.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,278.42 : 129,448.77 = 30,126.80 : x
  2. Step 2: Convert to fraction form
    86,278.42/129,448.77 = 30,126.80/x
  3. Step 3: Cross multiply
    86,278.42x = 129,448.77 × 30,126.80
  4. Step 4: Simplify right side
    86,278.42x = 3,899,877,204.04
  5. Step 5: Solve for x
    x = 3,899,877,204.04/86,278.42
  6. Step 6: Final answer
    x = 45,201.07

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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.