Home / 138,633.59-191,313.98-74,971.39

Finding the Fourth Proportional to 138,633.59, 191,313.98 and 74,971.39

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Solution

The fourth proportional to 138,633.59, 191,313.98 and 74,971.39 is: 103,460.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,633.59 : 191,313.98 = 74,971.39 : x
  2. Step 2: Convert to fraction form
    138,633.59/191,313.98 = 74,971.39/x
  3. Step 3: Cross multiply
    138,633.59x = 191,313.98 × 74,971.39
  4. Step 4: Simplify right side
    138,633.59x = 14,343,073,775.78
  5. Step 5: Solve for x
    x = 14,343,073,775.78/138,633.59
  6. Step 6: Final answer
    x = 103,460.31

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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.