Home / 85,776,244.20-128,664,366.30-76,706,317.80

Finding the Fourth Proportional to 85,776,244.20, 128,664,366.30 and 76,706,317.80

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Solution

The fourth proportional to 85,776,244.20, 128,664,366.30 and 76,706,317.80 is: 115,059,476.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,776,244.20 : 128,664,366.30 = 76,706,317.80 : x
  2. Step 2: Convert to fraction form
    85,776,244.20/128,664,366.30 = 76,706,317.80/x
  3. Step 3: Cross multiply
    85,776,244.20x = 128,664,366.30 × 76,706,317.80
  4. Step 4: Simplify right side
    85,776,244.20x = 9,869,369,770,943,410
  5. Step 5: Solve for x
    x = 9,869,369,770,943,410/85,776,244.20
  6. Step 6: Final answer
    x = 115,059,476.70

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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.