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Finding the Fourth Proportional to 75,299.97, 112,953.75 and 19,140.63

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Solution

The fourth proportional to 75,299.97, 112,953.75 and 19,140.63 is: 28,711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,299.97 : 112,953.75 = 19,140.63 : x
  2. Step 2: Convert to fraction form
    75,299.97/112,953.75 = 19,140.63/x
  3. Step 3: Cross multiply
    75,299.97x = 112,953.75 × 19,140.63
  4. Step 4: Simplify right side
    75,299.97x = 2,162,005,935.86
  5. Step 5: Solve for x
    x = 2,162,005,935.86/75,299.97
  6. Step 6: Final answer
    x = 28,711.91

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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.