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Finding the Fourth Proportional to 280,552,693.60, 420,829,040.40 and 86,446,820.80

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Solution

The fourth proportional to 280,552,693.60, 420,829,040.40 and 86,446,820.80 is: 129,670,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,552,693.60 : 420,829,040.40 = 86,446,820.80 : x
  2. Step 2: Convert to fraction form
    280,552,693.60/420,829,040.40 = 86,446,820.80/x
  3. Step 3: Cross multiply
    280,552,693.60x = 420,829,040.40 × 86,446,820.80
  4. Step 4: Simplify right side
    280,552,693.60x = 36,379,332,642,894,760
  5. Step 5: Solve for x
    x = 36,379,332,642,894,760/280,552,693.60
  6. Step 6: Final answer
    x = 129,670,231.20

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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.