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Finding the Fourth Proportional to 138,989.53, 191,826.14 and 88,007.00

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Solution

The fourth proportional to 138,989.53, 191,826.14 and 88,007.00 is: 121,462.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,989.53 : 191,826.14 = 88,007.00 : x
  2. Step 2: Convert to fraction form
    138,989.53/191,826.14 = 88,007.00/x
  3. Step 3: Cross multiply
    138,989.53x = 191,826.14 × 88,007.00
  4. Step 4: Simplify right side
    138,989.53x = 16,882,041,703.81
  5. Step 5: Solve for x
    x = 16,882,041,703.81/138,989.53
  6. Step 6: Final answer
    x = 121,462.69

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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.