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Finding the Fourth Proportional to 98,919.42, 148,527.36 and 85,633.39

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Solution

The fourth proportional to 98,919.42, 148,527.36 and 85,633.39 is: 128,578.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,919.42 : 148,527.36 = 85,633.39 : x
  2. Step 2: Convert to fraction form
    98,919.42/148,527.36 = 85,633.39/x
  3. Step 3: Cross multiply
    98,919.42x = 148,527.36 × 85,633.39
  4. Step 4: Simplify right side
    98,919.42x = 12,718,901,344.55
  5. Step 5: Solve for x
    x = 12,718,901,344.55/98,919.42
  6. Step 6: Final answer
    x = 128,578.41

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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.