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Finding the Fourth Proportional to 68,990,903.80, 103,486,355.70 and 65,631,671.80

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Solution

The fourth proportional to 68,990,903.80, 103,486,355.70 and 65,631,671.80 is: 98,447,507.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990,903.80 : 103,486,355.70 = 65,631,671.80 : x
  2. Step 2: Convert to fraction form
    68,990,903.80/103,486,355.70 = 65,631,671.80/x
  3. Step 3: Cross multiply
    68,990,903.80x = 103,486,355.70 × 65,631,671.80
  4. Step 4: Simplify right side
    68,990,903.80x = 6,791,982,533,080,459
  5. Step 5: Solve for x
    x = 6,791,982,533,080,459/68,990,903.80
  6. Step 6: Final answer
    x = 98,447,507.70

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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.