Home / 130,890.20-180,623.70-79,988.14

Finding the Fourth Proportional to 130,890.20, 180,623.70 and 79,988.14

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Solution

The fourth proportional to 130,890.20, 180,623.70 and 79,988.14 is: 110,380.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,890.20 : 180,623.70 = 79,988.14 : x
  2. Step 2: Convert to fraction form
    130,890.20/180,623.70 = 79,988.14/x
  3. Step 3: Cross multiply
    130,890.20x = 180,623.70 × 79,988.14
  4. Step 4: Simplify right side
    130,890.20x = 14,447,753,802.92
  5. Step 5: Solve for x
    x = 14,447,753,802.92/130,890.20
  6. Step 6: Final answer
    x = 110,380.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.