Home / 138,873.98-191,650.02-78,447.17

Finding the Fourth Proportional to 138,873.98, 191,650.02 and 78,447.17

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Solution

The fourth proportional to 138,873.98, 191,650.02 and 78,447.17 is: 108,259.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,873.98 : 191,650.02 = 78,447.17 : x
  2. Step 2: Convert to fraction form
    138,873.98/191,650.02 = 78,447.17/x
  3. Step 3: Cross multiply
    138,873.98x = 191,650.02 × 78,447.17
  4. Step 4: Simplify right side
    138,873.98x = 15,034,401,468.26
  5. Step 5: Solve for x
    x = 15,034,401,468.26/138,873.98
  6. Step 6: Final answer
    x = 108,259.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.