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Finding the Fourth Proportional to 78,958.55, 108,962.58 and 43,148.79

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Solution

The fourth proportional to 78,958.55, 108,962.58 and 43,148.79 is: 59,545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.55 : 108,962.58 = 43,148.79 : x
  2. Step 2: Convert to fraction form
    78,958.55/108,962.58 = 43,148.79/x
  3. Step 3: Cross multiply
    78,958.55x = 108,962.58 × 43,148.79
  4. Step 4: Simplify right side
    78,958.55x = 4,701,603,482.28
  5. Step 5: Solve for x
    x = 4,701,603,482.28/78,958.55
  6. Step 6: Final answer
    x = 59,545.21

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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.