Home / 138,645.81-191,331.27-74,983.62

Finding the Fourth Proportional to 138,645.81, 191,331.27 and 74,983.62

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Solution

The fourth proportional to 138,645.81, 191,331.27 and 74,983.62 is: 103,477.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,645.81 : 191,331.27 = 74,983.62 : x
  2. Step 2: Convert to fraction form
    138,645.81/191,331.27 = 74,983.62/x
  3. Step 3: Cross multiply
    138,645.81x = 191,331.27 × 74,983.62
  4. Step 4: Simplify right side
    138,645.81x = 14,346,711,243.80
  5. Step 5: Solve for x
    x = 14,346,711,243.80/138,645.81
  6. Step 6: Final answer
    x = 103,477.42

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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.