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Finding the Fourth Proportional to 92,846.40, 128,045.52 and 74,935.68

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Solution

The fourth proportional to 92,846.40, 128,045.52 and 74,935.68 is: 103,344.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,846.40 : 128,045.52 = 74,935.68 : x
  2. Step 2: Convert to fraction form
    92,846.40/128,045.52 = 74,935.68/x
  3. Step 3: Cross multiply
    92,846.40x = 128,045.52 × 74,935.68
  4. Step 4: Simplify right side
    92,846.40x = 9,595,178,112.15
  5. Step 5: Solve for x
    x = 9,595,178,112.15/92,846.40
  6. Step 6: Final answer
    x = 103,344.64

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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.