Home / 138,776.04-191,520.18-78,325.20

Finding the Fourth Proportional to 138,776.04, 191,520.18 and 78,325.20

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Solution

The fourth proportional to 138,776.04, 191,520.18 and 78,325.20 is: 108,093.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,776.04 : 191,520.18 = 78,325.20 : x
  2. Step 2: Convert to fraction form
    138,776.04/191,520.18 = 78,325.20/x
  3. Step 3: Cross multiply
    138,776.04x = 191,520.18 × 78,325.20
  4. Step 4: Simplify right side
    138,776.04x = 15,000,856,402.54
  5. Step 5: Solve for x
    x = 15,000,856,402.54/138,776.04
  6. Step 6: Final answer
    x = 108,093.99

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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.