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Finding the Fourth Proportional to 139,088.40, 191,942.76 and 75,425.76

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Solution

The fourth proportional to 139,088.40, 191,942.76 and 75,425.76 is: 104,087.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,088.40 : 191,942.76 = 75,425.76 : x
  2. Step 2: Convert to fraction form
    139,088.40/191,942.76 = 75,425.76/x
  3. Step 3: Cross multiply
    139,088.40x = 191,942.76 × 75,425.76
  4. Step 4: Simplify right side
    139,088.40x = 14,477,428,549.50
  5. Step 5: Solve for x
    x = 14,477,428,549.50/139,088.40
  6. Step 6: Final answer
    x = 104,087.97

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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.