Home / 130,890.70-180,624.39-79,988.64

Finding the Fourth Proportional to 130,890.70, 180,624.39 and 79,988.64

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Solution

The fourth proportional to 130,890.70, 180,624.39 and 79,988.64 is: 110,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,890.70 : 180,624.39 = 79,988.64 : x
  2. Step 2: Convert to fraction form
    130,890.70/180,624.39 = 79,988.64/x
  3. Step 3: Cross multiply
    130,890.70x = 180,624.39 × 79,988.64
  4. Step 4: Simplify right side
    130,890.70x = 14,447,899,306.93
  5. Step 5: Solve for x
    x = 14,447,899,306.93/130,890.70
  6. Step 6: Final answer
    x = 110,381.40

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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.