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Finding the Fourth Proportional to 98,579.88, 135,989.70 and 66,737.64

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Solution

The fourth proportional to 98,579.88, 135,989.70 and 66,737.64 is: 92,063.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,579.88 : 135,989.70 = 66,737.64 : x
  2. Step 2: Convert to fraction form
    98,579.88/135,989.70 = 66,737.64/x
  3. Step 3: Cross multiply
    98,579.88x = 135,989.70 × 66,737.64
  4. Step 4: Simplify right side
    98,579.88x = 9,075,631,642.31
  5. Step 5: Solve for x
    x = 9,075,631,642.31/98,579.88
  6. Step 6: Final answer
    x = 92,063.73

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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.