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Finding the Fourth Proportional to 427,690.13, 641,510.28 and 112,146.93

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Solution

The fourth proportional to 427,690.13, 641,510.28 and 112,146.93 is: 168,213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,690.13 : 641,510.28 = 112,146.93 : x
  2. Step 2: Convert to fraction form
    427,690.13/641,510.28 = 112,146.93/x
  3. Step 3: Cross multiply
    427,690.13x = 641,510.28 × 112,146.93
  4. Step 4: Simplify right side
    427,690.13x = 71,943,408,465.44
  5. Step 5: Solve for x
    x = 71,943,408,465.44/427,690.13
  6. Step 6: Final answer
    x = 168,213.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.