Home / 85,968,101.80-128,952,152.70-68,961,989.80

Finding the Fourth Proportional to 85,968,101.80, 128,952,152.70 and 68,961,989.80

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Solution

The fourth proportional to 85,968,101.80, 128,952,152.70 and 68,961,989.80 is: 103,442,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,101.80 : 128,952,152.70 = 68,961,989.80 : x
  2. Step 2: Convert to fraction form
    85,968,101.80/128,952,152.70 = 68,961,989.80/x
  3. Step 3: Cross multiply
    85,968,101.80x = 128,952,152.70 × 68,961,989.80
  4. Step 4: Simplify right side
    85,968,101.80x = 8,892,797,039,185,442
  5. Step 5: Solve for x
    x = 8,892,797,039,185,442/85,968,101.80
  6. Step 6: Final answer
    x = 103,442,984.70

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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.