Home / 86,145.06-129,217.80-26,985.90

Finding the Fourth Proportional to 86,145.06, 129,217.80 and 26,985.90

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Solution

The fourth proportional to 86,145.06, 129,217.80 and 26,985.90 is: 40,478.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,145.06 : 129,217.80 = 26,985.90 : x
  2. Step 2: Convert to fraction form
    86,145.06/129,217.80 = 26,985.90/x
  3. Step 3: Cross multiply
    86,145.06x = 129,217.80 × 26,985.90
  4. Step 4: Simplify right side
    86,145.06x = 3,487,058,629.02
  5. Step 5: Solve for x
    x = 3,487,058,629.02/86,145.06
  6. Step 6: Final answer
    x = 40,478.92

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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.