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Finding the Fourth Proportional to 92,895.70, 128,249.21 and 61,156.87

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Solution

The fourth proportional to 92,895.70, 128,249.21 and 61,156.87 is: 84,431.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,895.70 : 128,249.21 = 61,156.87 : x
  2. Step 2: Convert to fraction form
    92,895.70/128,249.21 = 61,156.87/x
  3. Step 3: Cross multiply
    92,895.70x = 128,249.21 × 61,156.87
  4. Step 4: Simplify right side
    92,895.70x = 7,843,320,263.57
  5. Step 5: Solve for x
    x = 7,843,320,263.57/92,895.70
  6. Step 6: Final answer
    x = 84,431.47

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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.