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Finding the Fourth Proportional to 71,978.40, 107,967.60 and 62,355.60

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Solution

The fourth proportional to 71,978.40, 107,967.60 and 62,355.60 is: 93,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,978.40 : 107,967.60 = 62,355.60 : x
  2. Step 2: Convert to fraction form
    71,978.40/107,967.60 = 62,355.60/x
  3. Step 3: Cross multiply
    71,978.40x = 107,967.60 × 62,355.60
  4. Step 4: Simplify right side
    71,978.40x = 6,732,384,478.56
  5. Step 5: Solve for x
    x = 6,732,384,478.56/71,978.40
  6. Step 6: Final answer
    x = 93,533.40

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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.