Home / 138,942.04-191,739.54-75,280.90

Finding the Fourth Proportional to 138,942.04, 191,739.54 and 75,280.90

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Solution

The fourth proportional to 138,942.04, 191,739.54 and 75,280.90 is: 103,887.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,942.04 : 191,739.54 = 75,280.90 : x
  2. Step 2: Convert to fraction form
    138,942.04/191,739.54 = 75,280.90/x
  3. Step 3: Cross multiply
    138,942.04x = 191,739.54 × 75,280.90
  4. Step 4: Simplify right side
    138,942.04x = 14,434,325,136.79
  5. Step 5: Solve for x
    x = 14,434,325,136.79/138,942.04
  6. Step 6: Final answer
    x = 103,887.38

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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.