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Finding the Fourth Proportional to 78,655.49, 108,544.02 and 42,845.39

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Solution

The fourth proportional to 78,655.49, 108,544.02 and 42,845.39 is: 59,126.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,655.49 : 108,544.02 = 42,845.39 : x
  2. Step 2: Convert to fraction form
    78,655.49/108,544.02 = 42,845.39/x
  3. Step 3: Cross multiply
    78,655.49x = 108,544.02 × 42,845.39
  4. Step 4: Simplify right side
    78,655.49x = 4,650,610,869.07
  5. Step 5: Solve for x
    x = 4,650,610,869.07/78,655.49
  6. Step 6: Final answer
    x = 59,126.34

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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.