Home / 138,595.84-191,268.77-78,165.22

Finding the Fourth Proportional to 138,595.84, 191,268.77 and 78,165.22

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Solution

The fourth proportional to 138,595.84, 191,268.77 and 78,165.22 is: 107,871.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,595.84 : 191,268.77 = 78,165.22 : x
  2. Step 2: Convert to fraction form
    138,595.84/191,268.77 = 78,165.22/x
  3. Step 3: Cross multiply
    138,595.84x = 191,268.77 × 78,165.22
  4. Step 4: Simplify right side
    138,595.84x = 14,950,565,486.18
  5. Step 5: Solve for x
    x = 14,950,565,486.18/138,595.84
  6. Step 6: Final answer
    x = 107,871.68

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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.