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Finding the Fourth Proportional to 115,240.80, 172,798.80 and 51,987

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Solution

The fourth proportional to 115,240.80, 172,798.80 and 51,987 is: 77,952.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,240.80 : 172,798.80 = 51,987 : x
  2. Step 2: Convert to fraction form
    115,240.80/172,798.80 = 51,987/x
  3. Step 3: Cross multiply
    115,240.80x = 172,798.80 × 51,987
  4. Step 4: Simplify right side
    115,240.80x = 8,983,291,215.60
  5. Step 5: Solve for x
    x = 8,983,291,215.60/115,240.80
  6. Step 6: Final answer
    x = 77,952.35

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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.