Home / 85,500,451.20-128,334,657.60-42,418,300.80

Finding the Fourth Proportional to 85,500,451.20, 128,334,657.60 and 42,418,300.80

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Solution

The fourth proportional to 85,500,451.20, 128,334,657.60 and 42,418,300.80 is: 63,669,115.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,500,451.20 : 128,334,657.60 = 42,418,300.80 : x
  2. Step 2: Convert to fraction form
    85,500,451.20/128,334,657.60 = 42,418,300.80/x
  3. Step 3: Cross multiply
    85,500,451.20x = 128,334,657.60 × 42,418,300.80
  4. Step 4: Simplify right side
    85,500,451.20x = 5,443,738,109,141,805
  5. Step 5: Solve for x
    x = 5,443,738,109,141,805/85,500,451.20
  6. Step 6: Final answer
    x = 63,669,115.57

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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.