Home / 115,246.12-172,869.36-75,978.64

Finding the Fourth Proportional to 115,246.12, 172,869.36 and 75,978.64

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Solution

The fourth proportional to 115,246.12, 172,869.36 and 75,978.64 is: 113,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,246.12 : 172,869.36 = 75,978.64 : x
  2. Step 2: Convert to fraction form
    115,246.12/172,869.36 = 75,978.64/x
  3. Step 3: Cross multiply
    115,246.12x = 172,869.36 × 75,978.64
  4. Step 4: Simplify right side
    115,246.12x = 13,134,378,870.47
  5. Step 5: Solve for x
    x = 13,134,378,870.47/115,246.12
  6. Step 6: Final answer
    x = 113,968.08

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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.