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Finding the Fourth Proportional to 72,169.92, 99,695.34 and 68,386.68

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Solution

The fourth proportional to 72,169.92, 99,695.34 and 68,386.68 is: 94,469.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.92 : 99,695.34 = 68,386.68 : x
  2. Step 2: Convert to fraction form
    72,169.92/99,695.34 = 68,386.68/x
  3. Step 3: Cross multiply
    72,169.92x = 99,695.34 × 68,386.68
  4. Step 4: Simplify right side
    72,169.92x = 6,817,833,314.07
  5. Step 5: Solve for x
    x = 6,817,833,314.07/72,169.92
  6. Step 6: Final answer
    x = 94,469.18

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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.