Home / 138,653.40-191,341.90-74,991.16

Finding the Fourth Proportional to 138,653.40, 191,341.90 and 74,991.16

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Solution

The fourth proportional to 138,653.40, 191,341.90 and 74,991.16 is: 103,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,653.40 : 191,341.90 = 74,991.16 : x
  2. Step 2: Convert to fraction form
    138,653.40/191,341.90 = 74,991.16/x
  3. Step 3: Cross multiply
    138,653.40x = 191,341.90 × 74,991.16
  4. Step 4: Simplify right side
    138,653.40x = 14,348,951,037.60
  5. Step 5: Solve for x
    x = 14,348,951,037.60/138,653.40
  6. Step 6: Final answer
    x = 103,487.91

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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.