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Finding the Fourth Proportional to 79,123.40, 118,686.30 and 25,815.14

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Solution

The fourth proportional to 79,123.40, 118,686.30 and 25,815.14 is: 38,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,123.40 : 118,686.30 = 25,815.14 : x
  2. Step 2: Convert to fraction form
    79,123.40/118,686.30 = 25,815.14/x
  3. Step 3: Cross multiply
    79,123.40x = 118,686.30 × 25,815.14
  4. Step 4: Simplify right side
    79,123.40x = 3,063,903,450.58
  5. Step 5: Solve for x
    x = 3,063,903,450.58/79,123.40
  6. Step 6: Final answer
    x = 38,723.10

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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.