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Finding the Fourth Proportional to 72,705.51, 100,292.63 and 42,484.41

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Solution

The fourth proportional to 72,705.51, 100,292.63 and 42,484.41 is: 58,604.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,705.51 : 100,292.63 = 42,484.41 : x
  2. Step 2: Convert to fraction form
    72,705.51/100,292.63 = 42,484.41/x
  3. Step 3: Cross multiply
    72,705.51x = 100,292.63 × 42,484.41
  4. Step 4: Simplify right side
    72,705.51x = 4,260,873,000.48
  5. Step 5: Solve for x
    x = 4,260,873,000.48/72,705.51
  6. Step 6: Final answer
    x = 58,604.54

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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.