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Finding the Fourth Proportional to 111,880.64, 154,396.32 and 61,580

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Solution

The fourth proportional to 111,880.64, 154,396.32 and 61,580 is: 84,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,880.64 : 154,396.32 = 61,580 : x
  2. Step 2: Convert to fraction form
    111,880.64/154,396.32 = 61,580/x
  3. Step 3: Cross multiply
    111,880.64x = 154,396.32 × 61,580
  4. Step 4: Simplify right side
    111,880.64x = 9,507,725,385.60
  5. Step 5: Solve for x
    x = 9,507,725,385.60/111,880.64
  6. Step 6: Final answer
    x = 84,980.97

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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.