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Finding the Fourth Proportional to 78,854.85, 118,208.14 and 38,858.40

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Solution

The fourth proportional to 78,854.85, 118,208.14 and 38,858.40 is: 58,251.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,854.85 : 118,208.14 = 38,858.40 : x
  2. Step 2: Convert to fraction form
    78,854.85/118,208.14 = 38,858.40/x
  3. Step 3: Cross multiply
    78,854.85x = 118,208.14 × 38,858.40
  4. Step 4: Simplify right side
    78,854.85x = 4,593,379,090.23
  5. Step 5: Solve for x
    x = 4,593,379,090.23/78,854.85
  6. Step 6: Final answer
    x = 58,251.07

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1.5x scale

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.