Home / 103,685.10-155,399.65-70,405.10

Finding the Fourth Proportional to 103,685.10, 155,399.65 and 70,405.10

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Solution

The fourth proportional to 103,685.10, 155,399.65 and 70,405.10 is: 105,520.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.10 : 155,399.65 = 70,405.10 : x
  2. Step 2: Convert to fraction form
    103,685.10/155,399.65 = 70,405.10/x
  3. Step 3: Cross multiply
    103,685.10x = 155,399.65 × 70,405.10
  4. Step 4: Simplify right side
    103,685.10x = 10,940,927,898.22
  5. Step 5: Solve for x
    x = 10,940,927,898.22/103,685.10
  6. Step 6: Final answer
    x = 105,520.73

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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.