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Finding the Fourth Proportional to 72,487.16, 100,033.30 and 43,802.78

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Solution

The fourth proportional to 72,487.16, 100,033.30 and 43,802.78 is: 60,448.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,487.16 : 100,033.30 = 43,802.78 : x
  2. Step 2: Convert to fraction form
    72,487.16/100,033.30 = 43,802.78/x
  3. Step 3: Cross multiply
    72,487.16x = 100,033.30 × 43,802.78
  4. Step 4: Simplify right side
    72,487.16x = 4,381,736,632.57
  5. Step 5: Solve for x
    x = 4,381,736,632.57/72,487.16
  6. Step 6: Final answer
    x = 60,448.45

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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.