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Finding the Fourth Proportional to 139,088.07, 191,941.54 and 75,425.87

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Solution

The fourth proportional to 139,088.07, 191,941.54 and 75,425.87 is: 104,087.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,088.07 : 191,941.54 = 75,425.87 : x
  2. Step 2: Convert to fraction form
    139,088.07/191,941.54 = 75,425.87/x
  3. Step 3: Cross multiply
    139,088.07x = 191,941.54 × 75,425.87
  4. Step 4: Simplify right side
    139,088.07x = 14,477,358,036.25
  5. Step 5: Solve for x
    x = 14,477,358,036.25/139,088.07
  6. Step 6: Final answer
    x = 104,087.70

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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.