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Finding the Fourth Proportional to 78,990.17, 109,006.44 and 43,180.32

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Solution

The fourth proportional to 78,990.17, 109,006.44 and 43,180.32 is: 59,588.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.17 : 109,006.44 = 43,180.32 : x
  2. Step 2: Convert to fraction form
    78,990.17/109,006.44 = 43,180.32/x
  3. Step 3: Cross multiply
    78,990.17x = 109,006.44 × 43,180.32
  4. Step 4: Simplify right side
    78,990.17x = 4,706,932,961.26
  5. Step 5: Solve for x
    x = 4,706,932,961.26/78,990.17
  6. Step 6: Final answer
    x = 59,588.85

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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.