Home / 105,138.83-145,086.08-57,382.91

Finding the Fourth Proportional to 105,138.83, 145,086.08 and 57,382.91

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Solution

The fourth proportional to 105,138.83, 145,086.08 and 57,382.91 is: 79,185.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,138.83 : 145,086.08 = 57,382.91 : x
  2. Step 2: Convert to fraction form
    105,138.83/145,086.08 = 57,382.91/x
  3. Step 3: Cross multiply
    105,138.83x = 145,086.08 × 57,382.91
  4. Step 4: Simplify right side
    105,138.83x = 8,325,460,458.55
  5. Step 5: Solve for x
    x = 8,325,460,458.55/105,138.83
  6. Step 6: Final answer
    x = 79,185.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.