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Finding the Fourth Proportional to 92,992.10, 128,390.85 and 71,443.44

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Solution

The fourth proportional to 92,992.10, 128,390.85 and 71,443.44 is: 98,639.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,992.10 : 128,390.85 = 71,443.44 : x
  2. Step 2: Convert to fraction form
    92,992.10/128,390.85 = 71,443.44/x
  3. Step 3: Cross multiply
    92,992.10x = 128,390.85 × 71,443.44
  4. Step 4: Simplify right side
    92,992.10x = 9,172,683,988.52
  5. Step 5: Solve for x
    x = 9,172,683,988.52/92,992.10
  6. Step 6: Final answer
    x = 98,639.39

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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.