Home / 91,721.70-137,582.55-56,729.70

Finding the Fourth Proportional to 91,721.70, 137,582.55 and 56,729.70

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Solution

The fourth proportional to 91,721.70, 137,582.55 and 56,729.70 is: 85,094.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,721.70 : 137,582.55 = 56,729.70 : x
  2. Step 2: Convert to fraction form
    91,721.70/137,582.55 = 56,729.70/x
  3. Step 3: Cross multiply
    91,721.70x = 137,582.55 × 56,729.70
  4. Step 4: Simplify right side
    91,721.70x = 7,805,016,786.74
  5. Step 5: Solve for x
    x = 7,805,016,786.74/91,721.70
  6. Step 6: Final answer
    x = 85,094.55

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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.