Home / 103,619.90-155,429.85-70,355.90

Finding the Fourth Proportional to 103,619.90, 155,429.85 and 70,355.90

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Solution

The fourth proportional to 103,619.90, 155,429.85 and 70,355.90 is: 105,533.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.90 : 155,429.85 = 70,355.90 : x
  2. Step 2: Convert to fraction form
    103,619.90/155,429.85 = 70,355.90/x
  3. Step 3: Cross multiply
    103,619.90x = 155,429.85 × 70,355.90
  4. Step 4: Simplify right side
    103,619.90x = 10,935,406,983.62
  5. Step 5: Solve for x
    x = 10,935,406,983.62/103,619.90
  6. Step 6: Final answer
    x = 105,533.85

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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.