Home / 78,699.33-109,161.27-75,862.17

Finding the Fourth Proportional to 78,699.33, 109,161.27 and 75,862.17

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Solution

The fourth proportional to 78,699.33, 109,161.27 and 75,862.17 is: 105,225.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699.33 : 109,161.27 = 75,862.17 : x
  2. Step 2: Convert to fraction form
    78,699.33/109,161.27 = 75,862.17/x
  3. Step 3: Cross multiply
    78,699.33x = 109,161.27 × 75,862.17
  4. Step 4: Simplify right side
    78,699.33x = 8,281,210,822.16
  5. Step 5: Solve for x
    x = 8,281,210,822.16/78,699.33
  6. Step 6: Final answer
    x = 105,225.94

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.