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Finding the Fourth Proportional to 81,347.60, 122,021.40 and 46,355.60

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Solution

The fourth proportional to 81,347.60, 122,021.40 and 46,355.60 is: 69,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,347.60 : 122,021.40 = 46,355.60 : x
  2. Step 2: Convert to fraction form
    81,347.60/122,021.40 = 46,355.60/x
  3. Step 3: Cross multiply
    81,347.60x = 122,021.40 × 46,355.60
  4. Step 4: Simplify right side
    81,347.60x = 5,656,375,209.84
  5. Step 5: Solve for x
    x = 5,656,375,209.84/81,347.60
  6. Step 6: Final answer
    x = 69,533.40

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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.