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Finding the Fourth Proportional to 72,259.96, 99,718.00 and 39,994.65

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Solution

The fourth proportional to 72,259.96, 99,718.00 and 39,994.65 is: 55,192.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,259.96 : 99,718.00 = 39,994.65 : x
  2. Step 2: Convert to fraction form
    72,259.96/99,718.00 = 39,994.65/x
  3. Step 3: Cross multiply
    72,259.96x = 99,718.00 × 39,994.65
  4. Step 4: Simplify right side
    72,259.96x = 3,988,186,408.71
  5. Step 5: Solve for x
    x = 3,988,186,408.71/72,259.96
  6. Step 6: Final answer
    x = 55,192.21

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Double scale
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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.