Home / 138,399,145.70-207,457,000.95-80,861,800.10

Finding the Fourth Proportional to 138,399,145.70, 207,457,000.95 and 80,861,800.10

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Solution

The fourth proportional to 138,399,145.70, 207,457,000.95 and 80,861,800.10 is: 121,209,899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,399,145.70 : 207,457,000.95 = 80,861,800.10 : x
  2. Step 2: Convert to fraction form
    138,399,145.70/207,457,000.95 = 80,861,800.10/x
  3. Step 3: Cross multiply
    138,399,145.70x = 207,457,000.95 × 80,861,800.10
  4. Step 4: Simplify right side
    138,399,145.70x = 16,775,346,540,164,408
  5. Step 5: Solve for x
    x = 16,775,346,540,164,408/138,399,145.70
  6. Step 6: Final answer
    x = 121,209,899.49

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1.5x scale

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.