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Finding the Fourth Proportional to 79,078.70, 118,557.30 and 39,664.10

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Solution

The fourth proportional to 79,078.70, 118,557.30 and 39,664.10 is: 59,465.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,078.70 : 118,557.30 = 39,664.10 : x
  2. Step 2: Convert to fraction form
    79,078.70/118,557.30 = 39,664.10/x
  3. Step 3: Cross multiply
    79,078.70x = 118,557.30 × 39,664.10
  4. Step 4: Simplify right side
    79,078.70x = 4,702,468,602.93
  5. Step 5: Solve for x
    x = 4,702,468,602.93/79,078.70
  6. Step 6: Final answer
    x = 59,465.68

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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.