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Finding the Fourth Proportional to 103,065.60, 154,508.40 and 39,928.80

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Solution

The fourth proportional to 103,065.60, 154,508.40 and 39,928.80 is: 59,858.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,065.60 : 154,508.40 = 39,928.80 : x
  2. Step 2: Convert to fraction form
    103,065.60/154,508.40 = 39,928.80/x
  3. Step 3: Cross multiply
    103,065.60x = 154,508.40 × 39,928.80
  4. Step 4: Simplify right side
    103,065.60x = 6,169,335,001.92
  5. Step 5: Solve for x
    x = 6,169,335,001.92/103,065.60
  6. Step 6: Final answer
    x = 59,858.33

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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.