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Finding the Fourth Proportional to 75,672.71, 103,672.12 and 72,835.07

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Solution

The fourth proportional to 75,672.71, 103,672.12 and 72,835.07 is: 99,784.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,672.71 : 103,672.12 = 72,835.07 : x
  2. Step 2: Convert to fraction form
    75,672.71/103,672.12 = 72,835.07/x
  3. Step 3: Cross multiply
    75,672.71x = 103,672.12 × 72,835.07
  4. Step 4: Simplify right side
    75,672.71x = 7,550,966,120.83
  5. Step 5: Solve for x
    x = 7,550,966,120.83/75,672.71
  6. Step 6: Final answer
    x = 99,784.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.