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Finding the Fourth Proportional to 92,911.85, 128,271.54 and 61,173

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Solution

The fourth proportional to 92,911.85, 128,271.54 and 61,173 is: 84,453.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.85 : 128,271.54 = 61,173 : x
  2. Step 2: Convert to fraction form
    92,911.85/128,271.54 = 61,173/x
  3. Step 3: Cross multiply
    92,911.85x = 128,271.54 × 61,173
  4. Step 4: Simplify right side
    92,911.85x = 7,846,754,916.42
  5. Step 5: Solve for x
    x = 7,846,754,916.42/92,911.85
  6. Step 6: Final answer
    x = 84,453.76

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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.