Home / 280,552,712.60-420,829,068.90-86,446,839.80

Finding the Fourth Proportional to 280,552,712.60, 420,829,068.90 and 86,446,839.80

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Solution

The fourth proportional to 280,552,712.60, 420,829,068.90 and 86,446,839.80 is: 129,670,259.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,552,712.60 : 420,829,068.90 = 86,446,839.80 : x
  2. Step 2: Convert to fraction form
    280,552,712.60/420,829,068.90 = 86,446,839.80/x
  3. Step 3: Cross multiply
    280,552,712.60x = 420,829,068.90 × 86,446,839.80
  4. Step 4: Simplify right side
    280,552,712.60x = 36,379,343,102,381,456
  5. Step 5: Solve for x
    x = 36,379,343,102,381,456/280,552,712.60
  6. Step 6: Final answer
    x = 129,670,259.70

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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.