Home / 79,406.11-109,539.10-64,315.81

Finding the Fourth Proportional to 79,406.11, 109,539.10 and 64,315.81

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Solution

The fourth proportional to 79,406.11, 109,539.10 and 64,315.81 is: 88,722.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,406.11 : 109,539.10 = 64,315.81 : x
  2. Step 2: Convert to fraction form
    79,406.11/109,539.10 = 64,315.81/x
  3. Step 3: Cross multiply
    79,406.11x = 109,539.10 × 64,315.81
  4. Step 4: Simplify right side
    79,406.11x = 7,045,095,943.17
  5. Step 5: Solve for x
    x = 7,045,095,943.17/79,406.11
  6. Step 6: Final answer
    x = 88,722.34

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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.