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Finding the Fourth Proportional to 72,810.97, 100,451.71 and 42,586.63

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Solution

The fourth proportional to 72,810.97, 100,451.71 and 42,586.63 is: 58,753.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.97 : 100,451.71 = 42,586.63 : x
  2. Step 2: Convert to fraction form
    72,810.97/100,451.71 = 42,586.63/x
  3. Step 3: Cross multiply
    72,810.97x = 100,451.71 × 42,586.63
  4. Step 4: Simplify right side
    72,810.97x = 4,277,899,806.64
  5. Step 5: Solve for x
    x = 4,277,899,806.64/72,810.97
  6. Step 6: Final answer
    x = 58,753.51

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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.