Home / 86,779.16-130,189.51-30,631.87

Finding the Fourth Proportional to 86,779.16, 130,189.51 and 30,631.87

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Solution

The fourth proportional to 86,779.16, 130,189.51 and 30,631.87 is: 45,955.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,779.16 : 130,189.51 = 30,631.87 : x
  2. Step 2: Convert to fraction form
    86,779.16/130,189.51 = 30,631.87/x
  3. Step 3: Cross multiply
    86,779.16x = 130,189.51 × 30,631.87
  4. Step 4: Simplify right side
    86,779.16x = 3,987,947,992.52
  5. Step 5: Solve for x
    x = 3,987,947,992.52/86,779.16
  6. Step 6: Final answer
    x = 45,955.14

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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.