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Finding the Fourth Proportional to 111,988.00, 154,543.41 and 61,687.00

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Solution

The fourth proportional to 111,988.00, 154,543.41 and 61,687.00 is: 85,128.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,988.00 : 154,543.41 = 61,687.00 : x
  2. Step 2: Convert to fraction form
    111,988.00/154,543.41 = 61,687.00/x
  3. Step 3: Cross multiply
    111,988.00x = 154,543.41 × 61,687.00
  4. Step 4: Simplify right side
    111,988.00x = 9,533,319,525.85
  5. Step 5: Solve for x
    x = 9,533,319,525.85/111,988.00
  6. Step 6: Final answer
    x = 85,128.04

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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.