Home / 91,301.70-136,952.55-28,972.20

Finding the Fourth Proportional to 91,301.70, 136,952.55 and 28,972.20

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Solution

The fourth proportional to 91,301.70, 136,952.55 and 28,972.20 is: 43,458.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,301.70 : 136,952.55 = 28,972.20 : x
  2. Step 2: Convert to fraction form
    91,301.70/136,952.55 = 28,972.20/x
  3. Step 3: Cross multiply
    91,301.70x = 136,952.55 × 28,972.20
  4. Step 4: Simplify right side
    91,301.70x = 3,967,816,669.11
  5. Step 5: Solve for x
    x = 3,967,816,669.11/91,301.70
  6. Step 6: Final answer
    x = 43,458.30

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1.5x scale

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.