Home / 140,139.60-193,389-76,478.16

Finding the Fourth Proportional to 140,139.60, 193,389 and 76,478.16

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Solution

The fourth proportional to 140,139.60, 193,389 and 76,478.16 is: 105,537.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,139.60 : 193,389 = 76,478.16 : x
  2. Step 2: Convert to fraction form
    140,139.60/193,389 = 76,478.16/x
  3. Step 3: Cross multiply
    140,139.60x = 193,389 × 76,478.16
  4. Step 4: Simplify right side
    140,139.60x = 14,790,034,884.24
  5. Step 5: Solve for x
    x = 14,790,034,884.24/140,139.60
  6. Step 6: Final answer
    x = 105,537.87

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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.