Home / 280,861,872.60-421,292,808.90-172,022,755.80

Finding the Fourth Proportional to 280,861,872.60, 421,292,808.90 and 172,022,755.80

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Solution

The fourth proportional to 280,861,872.60, 421,292,808.90 and 172,022,755.80 is: 258,034,133.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,861,872.60 : 421,292,808.90 = 172,022,755.80 : x
  2. Step 2: Convert to fraction form
    280,861,872.60/421,292,808.90 = 172,022,755.80/x
  3. Step 3: Cross multiply
    280,861,872.60x = 421,292,808.90 × 172,022,755.80
  4. Step 4: Simplify right side
    280,861,872.60x = 72,471,949,985,700,768
  5. Step 5: Solve for x
    x = 72,471,949,985,700,768/280,861,872.60
  6. Step 6: Final answer
    x = 258,034,133.70

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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.