Home / 103,720.91-155,298.06-78,346.04

Finding the Fourth Proportional to 103,720.91, 155,298.06 and 78,346.04

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Solution

The fourth proportional to 103,720.91, 155,298.06 and 78,346.04 is: 117,305.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,720.91 : 155,298.06 = 78,346.04 : x
  2. Step 2: Convert to fraction form
    103,720.91/155,298.06 = 78,346.04/x
  3. Step 3: Cross multiply
    103,720.91x = 155,298.06 × 78,346.04
  4. Step 4: Simplify right side
    103,720.91x = 12,166,987,244.19
  5. Step 5: Solve for x
    x = 12,166,987,244.19/103,720.91
  6. Step 6: Final answer
    x = 117,305.06

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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.