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Finding the Fourth Proportional to 99,074.42, 136,753.98 and 66,855.86

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Solution

The fourth proportional to 99,074.42, 136,753.98 and 66,855.86 is: 92,282.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,074.42 : 136,753.98 = 66,855.86 : x
  2. Step 2: Convert to fraction form
    99,074.42/136,753.98 = 66,855.86/x
  3. Step 3: Cross multiply
    99,074.42x = 136,753.98 × 66,855.86
  4. Step 4: Simplify right side
    99,074.42x = 9,142,804,941.32
  5. Step 5: Solve for x
    x = 9,142,804,941.32/99,074.42
  6. Step 6: Final answer
    x = 92,282.19

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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.