Home / 78,936.90-108,929.52-43,125.18

Finding the Fourth Proportional to 78,936.90, 108,929.52 and 43,125.18

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Solution

The fourth proportional to 78,936.90, 108,929.52 and 43,125.18 is: 59,510.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,936.90 : 108,929.52 = 43,125.18 : x
  2. Step 2: Convert to fraction form
    78,936.90/108,929.52 = 43,125.18/x
  3. Step 3: Cross multiply
    78,936.90x = 108,929.52 × 43,125.18
  4. Step 4: Simplify right side
    78,936.90x = 4,697,605,157.31
  5. Step 5: Solve for x
    x = 4,697,605,157.31/78,936.90
  6. Step 6: Final answer
    x = 59,510.89

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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.