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Finding the Fourth Proportional to 99,873.19, 137,880.70 and 69,291.64

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Solution

The fourth proportional to 99,873.19, 137,880.70 and 69,291.64 is: 95,661.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,873.19 : 137,880.70 = 69,291.64 : x
  2. Step 2: Convert to fraction form
    99,873.19/137,880.70 = 69,291.64/x
  3. Step 3: Cross multiply
    99,873.19x = 137,880.70 × 69,291.64
  4. Step 4: Simplify right side
    99,873.19x = 9,553,980,258.66
  5. Step 5: Solve for x
    x = 9,553,980,258.66/99,873.19
  6. Step 6: Final answer
    x = 95,661.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.