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Finding the Fourth Proportional to 72,630.84, 100,212.87 and 42,398.94

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Solution

The fourth proportional to 72,630.84, 100,212.87 and 42,398.94 is: 58,500.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.84 : 100,212.87 = 42,398.94 : x
  2. Step 2: Convert to fraction form
    72,630.84/100,212.87 = 42,398.94/x
  3. Step 3: Cross multiply
    72,630.84x = 100,212.87 × 42,398.94
  4. Step 4: Simplify right side
    72,630.84x = 4,248,919,462.36
  5. Step 5: Solve for x
    x = 4,248,919,462.36/72,630.84
  6. Step 6: Final answer
    x = 58,500.21

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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.