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Finding the Fourth Proportional to 71,166.48, 98,221.20 and 42,487.68

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Solution

The fourth proportional to 71,166.48, 98,221.20 and 42,487.68 is: 58,639.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,166.48 : 98,221.20 = 42,487.68 : x
  2. Step 2: Convert to fraction form
    71,166.48/98,221.20 = 42,487.68/x
  3. Step 3: Cross multiply
    71,166.48x = 98,221.20 × 42,487.68
  4. Step 4: Simplify right side
    71,166.48x = 4,173,190,914.82
  5. Step 5: Solve for x
    x = 4,173,190,914.82/71,166.48
  6. Step 6: Final answer
    x = 58,639.84

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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.