Home / 91,870.20-137,886.30-54,383.40

Finding the Fourth Proportional to 91,870.20, 137,886.30 and 54,383.40

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Solution

The fourth proportional to 91,870.20, 137,886.30 and 54,383.40 is: 81,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,870.20 : 137,886.30 = 54,383.40 : x
  2. Step 2: Convert to fraction form
    91,870.20/137,886.30 = 54,383.40/x
  3. Step 3: Cross multiply
    91,870.20x = 137,886.30 × 54,383.40
  4. Step 4: Simplify right side
    91,870.20x = 7,498,725,807.42
  5. Step 5: Solve for x
    x = 7,498,725,807.42/91,870.20
  6. Step 6: Final answer
    x = 81,623.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.