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Finding the Fourth Proportional to 78,701.59, 118,084.65 and 57,748.51

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Solution

The fourth proportional to 78,701.59, 118,084.65 and 57,748.51 is: 86,646.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,701.59 : 118,084.65 = 57,748.51 : x
  2. Step 2: Convert to fraction form
    78,701.59/118,084.65 = 57,748.51/x
  3. Step 3: Cross multiply
    78,701.59x = 118,084.65 × 57,748.51
  4. Step 4: Simplify right side
    78,701.59x = 6,819,212,591.37
  5. Step 5: Solve for x
    x = 6,819,212,591.37/78,701.59
  6. Step 6: Final answer
    x = 86,646.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.