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Finding the Fourth Proportional to 135,390.99, 186,840.32 and 74,963.55

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Solution

The fourth proportional to 135,390.99, 186,840.32 and 74,963.55 is: 103,450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,390.99 : 186,840.32 = 74,963.55 : x
  2. Step 2: Convert to fraction form
    135,390.99/186,840.32 = 74,963.55/x
  3. Step 3: Cross multiply
    135,390.99x = 186,840.32 × 74,963.55
  4. Step 4: Simplify right side
    135,390.99x = 14,006,213,295.52
  5. Step 5: Solve for x
    x = 14,006,213,295.52/135,390.99
  6. Step 6: Final answer
    x = 103,450.11

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1.5x scale

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.