Home / 138,943.05-191,741.60-75,280.80

Finding the Fourth Proportional to 138,943.05, 191,741.60 and 75,280.80

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Solution

The fourth proportional to 138,943.05, 191,741.60 and 75,280.80 is: 103,887.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,943.05 : 191,741.60 = 75,280.80 : x
  2. Step 2: Convert to fraction form
    138,943.05/191,741.60 = 75,280.80/x
  3. Step 3: Cross multiply
    138,943.05x = 191,741.60 × 75,280.80
  4. Step 4: Simplify right side
    138,943.05x = 14,434,460,664.88
  5. Step 5: Solve for x
    x = 14,434,460,664.88/138,943.05
  6. Step 6: Final answer
    x = 103,887.60

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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.