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Finding the Fourth Proportional to 111,489.40, 153,830.10 and 63,735.04

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Solution

The fourth proportional to 111,489.40, 153,830.10 and 63,735.04 is: 87,939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,489.40 : 153,830.10 = 63,735.04 : x
  2. Step 2: Convert to fraction form
    111,489.40/153,830.10 = 63,735.04/x
  3. Step 3: Cross multiply
    111,489.40x = 153,830.10 × 63,735.04
  4. Step 4: Simplify right side
    111,489.40x = 9,804,367,576.70
  5. Step 5: Solve for x
    x = 9,804,367,576.70/111,489.40
  6. Step 6: Final answer
    x = 87,939.91

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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.