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Finding the Fourth Proportional to 125,603.46, 188,674.92 and 78,889.14

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Solution

The fourth proportional to 125,603.46, 188,674.92 and 78,889.14 is: 118,503.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,603.46 : 188,674.92 = 78,889.14 : x
  2. Step 2: Convert to fraction form
    125,603.46/188,674.92 = 78,889.14/x
  3. Step 3: Cross multiply
    125,603.46x = 188,674.92 × 78,889.14
  4. Step 4: Simplify right side
    125,603.46x = 14,884,402,178.37
  5. Step 5: Solve for x
    x = 14,884,402,178.37/125,603.46
  6. Step 6: Final answer
    x = 118,503.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.