Home / 90,721.70-136,066.35-57,382.10

Finding the Fourth Proportional to 90,721.70, 136,066.35 and 57,382.10

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Solution

The fourth proportional to 90,721.70, 136,066.35 and 57,382.10 is: 86,062.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,721.70 : 136,066.35 = 57,382.10 : x
  2. Step 2: Convert to fraction form
    90,721.70/136,066.35 = 57,382.10/x
  3. Step 3: Cross multiply
    90,721.70x = 136,066.35 × 57,382.10
  4. Step 4: Simplify right side
    90,721.70x = 7,807,772,902.34
  5. Step 5: Solve for x
    x = 7,807,772,902.34/90,721.70
  6. Step 6: Final answer
    x = 86,062.90

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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.