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Finding the Fourth Proportional to 135,393.30, 186,849.66 and 74,970.63

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Solution

The fourth proportional to 135,393.30, 186,849.66 and 74,970.63 is: 103,463.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,393.30 : 186,849.66 = 74,970.63 : x
  2. Step 2: Convert to fraction form
    135,393.30/186,849.66 = 74,970.63/x
  3. Step 3: Cross multiply
    135,393.30x = 186,849.66 × 74,970.63
  4. Step 4: Simplify right side
    135,393.30x = 14,008,236,725.49
  5. Step 5: Solve for x
    x = 14,008,236,725.49/135,393.30
  6. Step 6: Final answer
    x = 103,463.29

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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.