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Finding the Fourth Proportional to 70,220.80, 105,331.20 and 45,337.60

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Solution

The fourth proportional to 70,220.80, 105,331.20 and 45,337.60 is: 68,006.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,220.80 : 105,331.20 = 45,337.60 : x
  2. Step 2: Convert to fraction form
    70,220.80/105,331.20 = 45,337.60/x
  3. Step 3: Cross multiply
    70,220.80x = 105,331.20 × 45,337.60
  4. Step 4: Simplify right side
    70,220.80x = 4,775,463,813.12
  5. Step 5: Solve for x
    x = 4,775,463,813.12/70,220.80
  6. Step 6: Final answer
    x = 68,006.40

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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.