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Finding the Fourth Proportional to 100,931.63, 139,285.64 and 58,514.76

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Solution

The fourth proportional to 100,931.63, 139,285.64 and 58,514.76 is: 80,750.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,931.63 : 139,285.64 = 58,514.76 : x
  2. Step 2: Convert to fraction form
    100,931.63/139,285.64 = 58,514.76/x
  3. Step 3: Cross multiply
    100,931.63x = 139,285.64 × 58,514.76
  4. Step 4: Simplify right side
    100,931.63x = 8,150,265,942.33
  5. Step 5: Solve for x
    x = 8,150,265,942.33/100,931.63
  6. Step 6: Final answer
    x = 80,750.37

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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.