Home / 86,690.09-130,072.70-30,570.30

Finding the Fourth Proportional to 86,690.09, 130,072.70 and 30,570.30

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Solution

The fourth proportional to 86,690.09, 130,072.70 and 30,570.30 is: 45,868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,690.09 : 130,072.70 = 30,570.30 : x
  2. Step 2: Convert to fraction form
    86,690.09/130,072.70 = 30,570.30/x
  3. Step 3: Cross multiply
    86,690.09x = 130,072.70 × 30,570.30
  4. Step 4: Simplify right side
    86,690.09x = 3,976,361,460.81
  5. Step 5: Solve for x
    x = 3,976,361,460.81/86,690.09
  6. Step 6: Final answer
    x = 45,868.70

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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.