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Finding the Fourth Proportional to 111,939.02, 154,475.07 and 61,638.02

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Solution

The fourth proportional to 111,939.02, 154,475.07 and 61,638.02 is: 85,060.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.02 : 154,475.07 = 61,638.02 : x
  2. Step 2: Convert to fraction form
    111,939.02/154,475.07 = 61,638.02/x
  3. Step 3: Cross multiply
    111,939.02x = 154,475.07 × 61,638.02
  4. Step 4: Simplify right side
    111,939.02x = 9,521,537,454.16
  5. Step 5: Solve for x
    x = 9,521,537,454.16/111,939.02
  6. Step 6: Final answer
    x = 85,060.04

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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.