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Finding the Fourth Proportional to 91,256.08, 136,889.02 and 28,931.44

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Solution

The fourth proportional to 91,256.08, 136,889.02 and 28,931.44 is: 43,398.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,256.08 : 136,889.02 = 28,931.44 : x
  2. Step 2: Convert to fraction form
    91,256.08/136,889.02 = 28,931.44/x
  3. Step 3: Cross multiply
    91,256.08x = 136,889.02 × 28,931.44
  4. Step 4: Simplify right side
    91,256.08x = 3,960,396,468.79
  5. Step 5: Solve for x
    x = 3,960,396,468.79/91,256.08
  6. Step 6: Final answer
    x = 43,398.71

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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.