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Finding the Fourth Proportional to 45,281.60, 67,928.80 and 14,113.60

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Solution

The fourth proportional to 45,281.60, 67,928.80 and 14,113.60 is: 21,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,281.60 : 67,928.80 = 14,113.60 : x
  2. Step 2: Convert to fraction form
    45,281.60/67,928.80 = 14,113.60/x
  3. Step 3: Cross multiply
    45,281.60x = 67,928.80 × 14,113.60
  4. Step 4: Simplify right side
    45,281.60x = 958,719,911.68
  5. Step 5: Solve for x
    x = 958,719,911.68/45,281.60
  6. Step 6: Final answer
    x = 21,172.39

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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.