Home / 86,720.58-130,140-39,973.86

Finding the Fourth Proportional to 86,720.58, 130,140 and 39,973.86

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Solution

The fourth proportional to 86,720.58, 130,140 and 39,973.86 is: 59,988.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,720.58 : 130,140 = 39,973.86 : x
  2. Step 2: Convert to fraction form
    86,720.58/130,140 = 39,973.86/x
  3. Step 3: Cross multiply
    86,720.58x = 130,140 × 39,973.86
  4. Step 4: Simplify right side
    86,720.58x = 5,202,198,140.40
  5. Step 5: Solve for x
    x = 5,202,198,140.40/86,720.58
  6. Step 6: Final answer
    x = 59,988.05

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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.