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Finding the Fourth Proportional to 92,977.58, 128,370.84 and 71,428.94

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Solution

The fourth proportional to 92,977.58, 128,370.84 and 71,428.94 is: 98,619.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,977.58 : 128,370.84 = 71,428.94 : x
  2. Step 2: Convert to fraction form
    92,977.58/128,370.84 = 71,428.94/x
  3. Step 3: Cross multiply
    92,977.58x = 128,370.84 × 71,428.94
  4. Step 4: Simplify right side
    92,977.58x = 9,169,393,206.68
  5. Step 5: Solve for x
    x = 9,169,393,206.68/92,977.58
  6. Step 6: Final answer
    x = 98,619.41

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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.