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Finding the Fourth Proportional to 138,612.63, 191,285.57 and 74,950.41

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Solution

The fourth proportional to 138,612.63, 191,285.57 and 74,950.41 is: 103,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.63 : 191,285.57 = 74,950.41 : x
  2. Step 2: Convert to fraction form
    138,612.63/191,285.57 = 74,950.41/x
  3. Step 3: Cross multiply
    138,612.63x = 191,285.57 × 74,950.41
  4. Step 4: Simplify right side
    138,612.63x = 14,336,931,523.83
  5. Step 5: Solve for x
    x = 14,336,931,523.83/138,612.63
  6. Step 6: Final answer
    x = 103,431.64

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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.