Home / 138,568.12-191,224.13-74,905.92

Finding the Fourth Proportional to 138,568.12, 191,224.13 and 74,905.92

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Solution

The fourth proportional to 138,568.12, 191,224.13 and 74,905.92 is: 103,370.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,568.12 : 191,224.13 = 74,905.92 : x
  2. Step 2: Convert to fraction form
    138,568.12/191,224.13 = 74,905.92/x
  3. Step 3: Cross multiply
    138,568.12x = 191,224.13 × 74,905.92
  4. Step 4: Simplify right side
    138,568.12x = 14,323,819,009.32
  5. Step 5: Solve for x
    x = 14,323,819,009.32/138,568.12
  6. Step 6: Final answer
    x = 103,370.24

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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.