Home / 103,835.10-155,752.65-68,405.70

Finding the Fourth Proportional to 103,835.10, 155,752.65 and 68,405.70

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Solution

The fourth proportional to 103,835.10, 155,752.65 and 68,405.70 is: 102,608.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,835.10 : 155,752.65 = 68,405.70 : x
  2. Step 2: Convert to fraction form
    103,835.10/155,752.65 = 68,405.70/x
  3. Step 3: Cross multiply
    103,835.10x = 155,752.65 × 68,405.70
  4. Step 4: Simplify right side
    103,835.10x = 10,654,369,050.11
  5. Step 5: Solve for x
    x = 10,654,369,050.11/103,835.10
  6. Step 6: Final answer
    x = 102,608.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.