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Finding the Fourth Proportional to 136,702.81, 188,645.43 and 74,610.91

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Solution

The fourth proportional to 136,702.81, 188,645.43 and 74,610.91 is: 102,960.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,702.81 : 188,645.43 = 74,610.91 : x
  2. Step 2: Convert to fraction form
    136,702.81/188,645.43 = 74,610.91/x
  3. Step 3: Cross multiply
    136,702.81x = 188,645.43 × 74,610.91
  4. Step 4: Simplify right side
    136,702.81x = 14,075,007,199.64
  5. Step 5: Solve for x
    x = 14,075,007,199.64/136,702.81
  6. Step 6: Final answer
    x = 102,960.63

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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.