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Finding the Fourth Proportional to 92,894, 128,217.57 and 56,620.04

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Solution

The fourth proportional to 92,894, 128,217.57 and 56,620.04 is: 78,150.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,894 : 128,217.57 = 56,620.04 : x
  2. Step 2: Convert to fraction form
    92,894/128,217.57 = 56,620.04/x
  3. Step 3: Cross multiply
    92,894x = 128,217.57 × 56,620.04
  4. Step 4: Simplify right side
    92,894x = 7,259,683,942.10
  5. Step 5: Solve for x
    x = 7,259,683,942.10/92,894
  6. Step 6: Final answer
    x = 78,150.19

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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.