Home / 103,890.24-155,835.36-84,139.20

Finding the Fourth Proportional to 103,890.24, 155,835.36 and 84,139.20

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Solution

The fourth proportional to 103,890.24, 155,835.36 and 84,139.20 is: 126,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,890.24 : 155,835.36 = 84,139.20 : x
  2. Step 2: Convert to fraction form
    103,890.24/155,835.36 = 84,139.20/x
  3. Step 3: Cross multiply
    103,890.24x = 155,835.36 × 84,139.20
  4. Step 4: Simplify right side
    103,890.24x = 13,111,862,522.11
  5. Step 5: Solve for x
    x = 13,111,862,522.11/103,890.24
  6. Step 6: Final answer
    x = 126,208.80

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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.