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Finding the Fourth Proportional to 80,943.93, 121,415.90 and 43,521.63

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Solution

The fourth proportional to 80,943.93, 121,415.90 and 43,521.63 is: 65,282.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,943.93 : 121,415.90 = 43,521.63 : x
  2. Step 2: Convert to fraction form
    80,943.93/121,415.90 = 43,521.63/x
  3. Step 3: Cross multiply
    80,943.93x = 121,415.90 × 43,521.63
  4. Step 4: Simplify right side
    80,943.93x = 5,284,217,875.92
  5. Step 5: Solve for x
    x = 5,284,217,875.92/80,943.93
  6. Step 6: Final answer
    x = 65,282.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.