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Finding the Fourth Proportional to 92,900.85, 128,223.63 and 61,072.71

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Solution

The fourth proportional to 92,900.85, 128,223.63 and 61,072.71 is: 84,293.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,900.85 : 128,223.63 = 61,072.71 : x
  2. Step 2: Convert to fraction form
    92,900.85/128,223.63 = 61,072.71/x
  3. Step 3: Cross multiply
    92,900.85x = 128,223.63 × 61,072.71
  4. Step 4: Simplify right side
    92,900.85x = 7,830,964,570.14
  5. Step 5: Solve for x
    x = 7,830,964,570.14/92,900.85
  6. Step 6: Final answer
    x = 84,293.79

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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.