Home / 86,721.12-130,079.80-39,973.96

Finding the Fourth Proportional to 86,721.12, 130,079.80 and 39,973.96

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Solution

The fourth proportional to 86,721.12, 130,079.80 and 39,973.96 is: 59,960.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,721.12 : 130,079.80 = 39,973.96 : x
  2. Step 2: Convert to fraction form
    86,721.12/130,079.80 = 39,973.96/x
  3. Step 3: Cross multiply
    86,721.12x = 130,079.80 × 39,973.96
  4. Step 4: Simplify right side
    86,721.12x = 5,199,804,722.01
  5. Step 5: Solve for x
    x = 5,199,804,722.01/86,721.12
  6. Step 6: Final answer
    x = 59,960.07

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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.