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Finding the Fourth Proportional to 78,296.16, 108,050.60 and 42,487.68

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Solution

The fourth proportional to 78,296.16, 108,050.60 and 42,487.68 is: 58,634.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,296.16 : 108,050.60 = 42,487.68 : x
  2. Step 2: Convert to fraction form
    78,296.16/108,050.60 = 42,487.68/x
  3. Step 3: Cross multiply
    78,296.16x = 108,050.60 × 42,487.68
  4. Step 4: Simplify right side
    78,296.16x = 4,590,819,316.61
  5. Step 5: Solve for x
    x = 4,590,819,316.61/78,296.16
  6. Step 6: Final answer
    x = 58,634.03

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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.