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Finding the Fourth Proportional to 107,392.40, 148,141.80 and 99,789.84

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Solution

The fourth proportional to 107,392.40, 148,141.80 and 99,789.84 is: 137,654.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,392.40 : 148,141.80 = 99,789.84 : x
  2. Step 2: Convert to fraction form
    107,392.40/148,141.80 = 99,789.84/x
  3. Step 3: Cross multiply
    107,392.40x = 148,141.80 × 99,789.84
  4. Step 4: Simplify right side
    107,392.40x = 14,783,046,519.31
  5. Step 5: Solve for x
    x = 14,783,046,519.31/107,392.40
  6. Step 6: Final answer
    x = 137,654.50

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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.