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Finding the Fourth Proportional to 45,385.60, 68,078.40 and 40,374.40

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Solution

The fourth proportional to 45,385.60, 68,078.40 and 40,374.40 is: 60,561.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,385.60 : 68,078.40 = 40,374.40 : x
  2. Step 2: Convert to fraction form
    45,385.60/68,078.40 = 40,374.40/x
  3. Step 3: Cross multiply
    45,385.60x = 68,078.40 × 40,374.40
  4. Step 4: Simplify right side
    45,385.60x = 2,748,624,552.96
  5. Step 5: Solve for x
    x = 2,748,624,552.96/45,385.60
  6. Step 6: Final answer
    x = 60,561.60

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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.