Home / 137,021.60-205,532.40-99,405.20

Finding the Fourth Proportional to 137,021.60, 205,532.40 and 99,405.20

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Solution

The fourth proportional to 137,021.60, 205,532.40 and 99,405.20 is: 149,107.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,021.60 : 205,532.40 = 99,405.20 : x
  2. Step 2: Convert to fraction form
    137,021.60/205,532.40 = 99,405.20/x
  3. Step 3: Cross multiply
    137,021.60x = 205,532.40 × 99,405.20
  4. Step 4: Simplify right side
    137,021.60x = 20,430,989,328.48
  5. Step 5: Solve for x
    x = 20,430,989,328.48/137,021.60
  6. Step 6: Final answer
    x = 149,107.80

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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.