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Finding the Fourth Proportional to 100,908.96, 139,251.48 and 57,895.68

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Solution

The fourth proportional to 100,908.96, 139,251.48 and 57,895.68 is: 79,894.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.96 : 139,251.48 = 57,895.68 : x
  2. Step 2: Convert to fraction form
    100,908.96/139,251.48 = 57,895.68/x
  3. Step 3: Cross multiply
    100,908.96x = 139,251.48 × 57,895.68
  4. Step 4: Simplify right side
    100,908.96x = 8,062,059,125.61
  5. Step 5: Solve for x
    x = 8,062,059,125.61/100,908.96
  6. Step 6: Final answer
    x = 79,894.38

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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.