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Finding the Fourth Proportional to 92,900.35, 128,222.94 and 61,072.21

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Solution

The fourth proportional to 92,900.35, 128,222.94 and 61,072.21 is: 84,293.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,900.35 : 128,222.94 = 61,072.21 : x
  2. Step 2: Convert to fraction form
    92,900.35/128,222.94 = 61,072.21/x
  3. Step 3: Cross multiply
    92,900.35x = 128,222.94 × 61,072.21
  4. Step 4: Simplify right side
    92,900.35x = 7,830,858,318.50
  5. Step 5: Solve for x
    x = 7,830,858,318.50/92,900.35
  6. Step 6: Final answer
    x = 84,293.10

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1.5x scale

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.