Home / 137,638.60-189,981.66-89,899.36

Finding the Fourth Proportional to 137,638.60, 189,981.66 and 89,899.36

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Solution

The fourth proportional to 137,638.60, 189,981.66 and 89,899.36 is: 124,087.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,638.60 : 189,981.66 = 89,899.36 : x
  2. Step 2: Convert to fraction form
    137,638.60/189,981.66 = 89,899.36/x
  3. Step 3: Cross multiply
    137,638.60x = 189,981.66 × 89,899.36
  4. Step 4: Simplify right side
    137,638.60x = 17,079,229,645.74
  5. Step 5: Solve for x
    x = 17,079,229,645.74/137,638.60
  6. Step 6: Final answer
    x = 124,087.50

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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.