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Finding the Fourth Proportional to 427,659.60, 641,492.10 and 112,113.72

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Solution

The fourth proportional to 427,659.60, 641,492.10 and 112,113.72 is: 168,171.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,659.60 : 641,492.10 = 112,113.72 : x
  2. Step 2: Convert to fraction form
    427,659.60/641,492.10 = 112,113.72/x
  3. Step 3: Cross multiply
    427,659.60x = 641,492.10 × 112,113.72
  4. Step 4: Simplify right side
    427,659.60x = 71,920,065,681.61
  5. Step 5: Solve for x
    x = 71,920,065,681.61/427,659.60
  6. Step 6: Final answer
    x = 168,171.29

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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.