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Finding the Fourth Proportional to 91,607.63, 138,035.43 and 75,332.21

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Solution

The fourth proportional to 91,607.63, 138,035.43 and 75,332.21 is: 113,511.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,607.63 : 138,035.43 = 75,332.21 : x
  2. Step 2: Convert to fraction form
    91,607.63/138,035.43 = 75,332.21/x
  3. Step 3: Cross multiply
    91,607.63x = 138,035.43 × 75,332.21
  4. Step 4: Simplify right side
    91,607.63x = 10,398,513,310.02
  5. Step 5: Solve for x
    x = 10,398,513,310.02/91,607.63
  6. Step 6: Final answer
    x = 113,511.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.