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Finding the Fourth Proportional to 99,617.80, 139,568.60 and 99,617.80

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Solution

The fourth proportional to 99,617.80, 139,568.60 and 99,617.80 is: 139,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,617.80 : 139,568.60 = 99,617.80 : x
  2. Step 2: Convert to fraction form
    99,617.80/139,568.60 = 99,617.80/x
  3. Step 3: Cross multiply
    99,617.80x = 139,568.60 × 99,617.80
  4. Step 4: Simplify right side
    99,617.80x = 13,903,516,881.08
  5. Step 5: Solve for x
    x = 13,903,516,881.08/99,617.80
  6. Step 6: Final answer
    x = 139,568.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.