Home / 130,890.45-180,624.05-79,988.39

Finding the Fourth Proportional to 130,890.45, 180,624.05 and 79,988.39

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Solution

The fourth proportional to 130,890.45, 180,624.05 and 79,988.39 is: 110,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,890.45 : 180,624.05 = 79,988.39 : x
  2. Step 2: Convert to fraction form
    130,890.45/180,624.05 = 79,988.39/x
  3. Step 3: Cross multiply
    130,890.45x = 180,624.05 × 79,988.39
  4. Step 4: Simplify right side
    130,890.45x = 14,447,825,651.72
  5. Step 5: Solve for x
    x = 14,447,825,651.72/130,890.45
  6. Step 6: Final answer
    x = 110,381.05

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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.