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Finding the Fourth Proportional to 72,039.84, 99,295.98 and 48,157.80

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Solution

The fourth proportional to 72,039.84, 99,295.98 and 48,157.80 is: 66,378.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,039.84 : 99,295.98 = 48,157.80 : x
  2. Step 2: Convert to fraction form
    72,039.84/99,295.98 = 48,157.80/x
  3. Step 3: Cross multiply
    72,039.84x = 99,295.98 × 48,157.80
  4. Step 4: Simplify right side
    72,039.84x = 4,781,875,945.64
  5. Step 5: Solve for x
    x = 4,781,875,945.64/72,039.84
  6. Step 6: Final answer
    x = 66,378.21

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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.