Home / 86,451.57-129,693.02-42,078.29

Finding the Fourth Proportional to 86,451.57, 129,693.02 and 42,078.29

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Solution

The fourth proportional to 86,451.57, 129,693.02 and 42,078.29 is: 63,125.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,451.57 : 129,693.02 = 42,078.29 : x
  2. Step 2: Convert to fraction form
    86,451.57/129,693.02 = 42,078.29/x
  3. Step 3: Cross multiply
    86,451.57x = 129,693.02 × 42,078.29
  4. Step 4: Simplify right side
    86,451.57x = 5,457,259,647.68
  5. Step 5: Solve for x
    x = 5,457,259,647.68/86,451.57
  6. Step 6: Final answer
    x = 63,125.05

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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.